A history class is comprised of 10 female and 8 male students. If the instructor of the class randomly chooses 14 students from the class for an oral exam, what is the probability that 8 female students and 6 male students will be selected? Round your answer to 3 decimal places.

Answers

Answer 1

Step-by-step explanation:

I assume that one a student is picked for an oral exam, the same student will not be picked again.

the total number of possibilities to pick 14 students out of 18 is C(18, 14) = 18!/(14! × (18-14)!) = 18!/(14! × 4!) =

= 18×17×16×15/(4×3×2) = 18×17×2×5 =

= 3,060

how many of these possibilities contain exactly 8 girls and 6 boys ?

so, we choose 8 out of the 10 girls, and 6 out of the 8 boys.

that means

C(10, 8) × C(8, 6) = 10!/(8! × 2) × 8!/(6! × 2) =

= 10×9/2 × 8×7/2 = 5×9 × 4×7 =

= 45 × 28 = 1,260

so, the probability to have 8 girls and 6 boys in a random selection of 14 students out of 18 is

1260/3060 = 21/51 = 7/17 = 0.411764706... ≈ 0.412


Related Questions

The amount of money on account it makes M for working H hours can be represented by the equation m = 29.4H what is the constant of proportionality of the equation

Answers

29.4H is the equation

a) What is the definition of the square root of a number k?
b) what is the definition of the cube root of a number k?
c) what is the definition of the n^th root of a number k?
d) What are the limitations of working with roots and real numbers?

Answers

A is the right one that is what I chose

#a

Square root of k is a factor of the number k that when it is multiplied with itself yields the result as k

#b

Cube root of k is a factor of the number k that when it is multiplied thrice with itself yields the result as k

#c

n th root of k is a factor of the number k that when it is multiplied n times with itself yields the result as k

#d

For even value of root it should be positive to be realFor odd value it can be both positive and negative

Independent and Dependent events

Answers

There are 3 cards and only 1 card is off.

If you pick the odd card first and do not replace it there is no chance of picking a second odd card.

The probability would be 0

Calculate the line of best fit using m= y2-y1/x2-x1 using your brain not a calculator

Answers

Take two points

(1,940)(2,950)

Slope

m=950-940/2-1=10

Equation in point slope form

y-y1=m(x-x1)y-940=10(x-1)y-940=10x-10y=10x-10+940y=10x+930

Answer:

[tex]y=-\dfrac{300}{7}x+1000[/tex]

Step-by-step explanation:

Method 1  (see attachment 1 with red line)

Plots the points on a graph and draw a line of best fit, remembering to ensure the same number of points are above and below the line.

Use the two end-points of the line of best fit to find the slope:

[tex]\textsf{let}\:(x_1,y_1)=(0,1000)[/tex]

[tex]\textsf{let}\:(x_2,y_2)=(7,700)[/tex]

[tex]\textsf{slope}\:(m)=\dfrac{y_2-y_1}{x_2-x_1}=\dfrac{700-1000}{7-0}=-\dfrac{300}{7}[/tex]

Input the found slope and point (0, 1000) into point-slope form of a linear equation to determine the equation of the line of best fit:

[tex]\implies y-y_1=m(x-x_1)[/tex]

[tex]\implies y-1000=-\dfrac{300}{7}(x-0)[/tex]

[tex]\implies y=-\dfrac{300}{7}x+1000[/tex]

Method 2  (see attachment 2 with blue line)

If you aren't able to plot the points, you should be able to see that the general trend is that as x increases, y decreases.  Therefore, take the first and last points in the table and use these to find the slope:

[tex]\textsf{let}\:(x_1,y_1)=(1,940)[/tex]

[tex]\textsf{let}\:(x_2,y_2)=(7,710)[/tex]

[tex]\textsf{slope}\:(m)=\dfrac{y_2-y_1}{x_2-x_1}=\dfrac{710-940}{7-1}=-\dfrac{115}{3}[/tex]

Input the found slope and point (1, 940) into point-slope form of a linear equation to determine the equation of the line of best fit:

[tex]\implies y-y_1=m(x-x_1)[/tex]

[tex]\implies y-940=-\dfrac{115}{3}(x-1)[/tex]

[tex]\implies y=-\dfrac{115}{3}x+\dfrac{2935}{3}[/tex]

help asap check picture

Answers

The value of the P(2 < X ≤ 4) is 0.14 if the probability of P(x =3) is 0.10 and P(x = 4) is 0.04.

What is a normal distribution?

It's the probability curve of a continuous distribution that's most likely symmetric around the mean. On the Z curve, at Z=0, the chance is 50-50. A bell-shaped curve is another name for it.

We have a probability distribution shown in the table:

P(2 < X ≤ 4)

We have to find the probability between 2 and 4

P(2 < X ≤ 4) = P(x =3) + P(x = 4)

From the table

P(x =3) = 0.10

P(x = 4) = 0.04

P(2 < X ≤ 4) = 0.10 + 0.04 = 0.14

Thus, the value of the P(2 < X ≤ 4) is 0.14 if the probability of P(x =3) is 0.10 and P(x = 4) is 0.04.

Learn more about the normal distribution here:

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Which coordinates identify a location north of a city that has a latitude of 38. 0°n and a longitude of 25. 0°w?.

Answers

Using translation concepts, y-coordinates greater than 38 identify a location north of the city.

What is a translation?

A translation is represented by a change in the function graph, according to operations such as multiplication or sum/subtraction in it's definition.

Considering latitude and longitude, the coordinates of a city are given as follows:

(LON, LAT).

Hence, the given city has coordinates given by:

(25, 38)

As we move north, the latitude increases, hence, y-coordinates greater than 38 identify a location north of the city.

More can be learned about translation concepts at https://brainly.com/question/4521517

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Hey guys! Sorry to bother but I need help with these. 5th grade math, will give brainliest! (If you see multiple questions by me that look the same, they are all different.)

Answers

Answer:

1/36 and 1/28

Step-by-step explanation:

i believe this is the answer as you should divide the denomonator by the answer as you cannot divide the numerator.

Jia needs 3/4 cups of blueberries to make scones. How many cups of blueberries does she need to make 3 times as many scones? I think it's either C or A, i'm not sure
A. 1/4 cups
B. 1 1/2 cups
C. 2 1/4 cups
D. 3 3/4 cups

Answers

C, 2 1/4 cups, is the correct answer. She needs 3 times as many, so multiply 3/4 by 3, which = 9/4. 4 will go into 9 two times and leave 1/4 left.

Please help me with this it's algebra WILL GIVE BRAINLIEST and 5 points

Answers

Answer:

y=4/-2x+4

Step-by-step explanation:

Formula (y=mx+b)

m= 4/-2 (rise over run)

b= 4 (y-axis intercept point)

y=mx+b

y=4/-2x+4

A theater has 33 seats in the first row, 37 seats in the second row. 41 seats in the third row, and so on. How many seats are there in row 19?

Answers

Answer:

90 seats are in row 19

Step-by-step explanation:

The pattern is adding 4 seats so 3 x 19 is 57 so 33 + 57 is 90 seats

Hope this helps


If m varies directly with t, and m = 4 when t = 12, what is the value of t when m = 12?
O4
O20
O24
O36

Answers

Answer:

t = 36

Step-by-step explanation:

given that m varies directly with t then the equation relating them is

m = kt ← k is the constant of variation

to find k use the condition m = 4 when t = 12 , then

4 = 12k ( divide both sides by 12 )

[tex]\frac{4}{12}[/tex] = k , that is

k = [tex]\frac{1}{3}[/tex]

m = [tex]\frac{1}{3}[/tex] t ← equation of variation

when m = 12 , then

12 = [tex]\frac{1}{3}[/tex] t ( multiply both sides by 3 to clear the fraction )

36 = t

what is 2y + 3 + 5x + 6 simplified and justified

Answers

2y + 3 + 5x + 6

2y + 5x + 9 = 0

hope it helps...!!!

6 raised to the third power plus 4

Answers

Answer:

6^3+4 equals 220.

Step-by-step explanation:

6^3 equals 216.

Plus 4 equals 220.

Answer:

Step-by-step explanation:

6004

6 to the third power is 6000 and 6000+4 is 6004

Before his shopping spree,hall owned 31 phones. He bought 70 more phones. What is the ratio of phones purchase to the resulting total number of phones?

Answers

Answer:

70:101     70 is 69% of 101

Step-by-step explanation:

Since he had 30 phones and bought 70, he totals with 101 phones. Since 70/101 is 69, 70 is 69% of 101

Ok well good luck! Have a good day!

helppppppppppppppppp

Answers

Range = 5
Mode is 6

5 STARS ON YOUR AND ANSWER AND A THANK YOU.

Answers

Answer:

It's the fourth answer, D.

The answer is D !!!
Hope this helpssss

What is the fraction in its simplest for of a recuring decimal 0. 1

Answers

Answer:

[tex]\frac{1}{9}[/tex]

Step-by-step explanation:

x= 0.1111...

10x = 1.11111111

10x - x = 1

9x = 1

x = [tex]\frac{1}{9}[/tex]

The area of a rectangular ink pad is 28 square centimeters. It is 7 centimeters wide. How tall is it?

Answers

Answer:

4 cm

Step-by-step explanation:

The area is found by the length times width. You already know that the area is 28 and the width is 7. All you have to do is divided 28 by 7 to get 4.

Answer:

4 cm

Step-by-step explanation:

28=7*W

W=28/7

W=4 inches

(a) How long did it take you to set up your building materials? How do you
(b) How long did it take to build each shelf ​

Answers

The answer would be 3,95

triangle ABC has a perimiter of 22cm
ab=8cm
bc=5cm
by claculation deduce whether triangle abc is a right angle triangle

Answers

Answer:

ABC is not a right angled triangle.

Step-by-step explanation:

Step 1: Given the perimeter of ΔABC = 22 cm, sides AB = 8 cm and BC = 5 cm. Find the side AC.

Perimeter = AB + BC + AC

⇒ AC = 22 - (8 + 5) = 22 - 13 = 9 cm

Step 2: Find whether the triangle is right angled using Pythagoras Theorem which is Hypotenuse² = Side² + Base²

AC² = AB² + BC²

⇒ AC² = 9² = 81

⇒ AB² + BC² = 8² + 5² = 64 + 25 = 89

∴ AC² ≠ AB² + BC²

⇒ ΔABC is not a right angled triangle.

If f(x)= 2^8-x+3, what is the value of f(5), to the nearest tenth (if necessary)

Answers

Answer:

Step-by-step explanation:

f(5) = 2^8 - 5 +3

f(5) = 256-5+3

f(5) = 254

what is f(x)=x^2 transformed 3 units to the left

Answers

Answer:

Equation:

f(x) = (x + 3)^2

Graph: see image

Step-by-step explanation:

Translation just means shift or slide. To show a LEFT shift in the equation, go in close to the x, inside the parenthesis with the x, for LEFT shift, insert +3.

Left and right shifts might be the opposite of what you may think. Minus a number shifts right and plus a number shifts left.

For the graph, see image. The answer is the green curve.

Help!!! Find the slope and y-intercept

Answers

Answer:

To find y-intercept: set x = 0 and solve for y. The point will be (0, y). To find x-intercept: set y = 0 and solve for x. The point will be (x, 0).

Step-by-step explanation:


Beniah sells hats and umbrellas. He charges 57.75 per hat and $9.50 per umbrella. Last week he sold 90 items for a total
of $757

Answers

Answer : $757

explanation: 57.75 + 9.50 = 67.25
67.25/757

I need help round pleae

Answers

Answer:

Mean=49 pounds

Median=11pounds

Step-by-step explanation:

If all the cats got weighted (5, 11,11,12,10) for each cat you need to add, multiply and divide to get all the answers (P.S. you don't need to round for your answers!)

For solving the Mean you need to add up all the numbers and then divide by how many numbers there are (5+11+11+12+10÷ 5=49)

For solving the Median you need to put the numbers in smallest to biggest order to solve for this (5,10,11,11,12) and then kept crossing them out (left to right) until you get the two middle numbers (11,11) then add them both right and then divide 22 by 2 then you have your answer!

You're going to rock this:)

Kenz

5
Alvin, Simon and Theo all collect marbles.
Alvin has k marbles.
Simon has 3 more marbles than Alvin.
Theo has twice as many marbles as Alvin.
Complete the table by writing an expression in for Simon and Theo.

Answers

Answer:

[tex] \begin{gathered}\begin{gathered}\boxed{\begin{array}{}\sf { \rightarrow \: \red{i \: dont \: know \: anymore\:\color{green}☘}}\end{array}}\end{gathered} \end{gathered}[/tex]

[tex] \color {blue} \rule {1pt} {100000pt} [/tex]

Can i get some help? Points P, Q, R, and S represent -3, -1, 0 and 2, respectively, on a number line. How many units is the midpoint of PQ from the midpoint of RS?

Answers

Answer:

3 units

Step-by-step explanation:

The midpoint of P and Q is -2, the midpoint of R and S is 1, the total distance between -2 and 1 is three

|-2| + |1| = 3

lengths
Find the value of x in the triangle shown below.
Choose 1 answer:
x = 6
® X = 13
X = V 65

Answers

Answer:

C

Step-by-step explanation:

using Pythagoras' identity in the right triangle

the square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is

x² + 4² = 9²

x² + 16 = 81 ( subtract 16 from both sides )

x² = 65 ( take square root of both sides )

x = [tex]\sqrt{65}[/tex]

The student council sets up a booth to sell bracelets for $2.50 each and a booth to sell necklaces for $5 each. A $50 donation is made at the booth selling bracelets. The student council decides to close the booths when the amount of money collected is the same.​

Answers

The students council sold 20 bracelets and 10 necklesses.

What is division?

The division is a method of distributing a group of things into equal parts. It is one of the four basic operations of arithmetic,

here the number of the bracelets sold will be

[tex]N_{B}=\dfrac{50}{2.5}=20[/tex]

Number of the necklesses sold will be

[tex]N_{N}=\dfrac{50}{5}=10[/tex]

Hence the students council sold 20 bracelets and 10 necklesses.

To know more about division follow

https://brainly.com/question/25289437

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i need help with this question​

Answers

Answer:

express 33362imstandard form

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