Mathematics College

The grades of an exam whose mean is 82 and whose standard deviation is 14 are normally distributed. Anyone who scores below 55 will be retested. What percentage does this represent

Answers

Answer 1

Answer:

This represents 2.6803%

Step-by-step explanation:

We start by calculating the z-score

Mathematically;

z-score = (x - mean)/SD

here our x is 55

mean = 82

SD = 14

z-score = (55-82)/14

z-score = -1.93

So the probability that a test taker will be retested will be;

P( x < -1.93)

We use the standard normal distribution table for this

P( x < -1.93) = 0.026803

If we convert this to percentage, we have 2.6803%

Related Questions

2,375×6 help i need step by step

Answers

Answer:

14250

Step-by-step explanation:

14250

6

=2375

Answer:

14,250

Step-by-step explanation:

Just multiply 6 by all of them.

-3/7 divided by 5/7
plss help ik im lazy but i have no paper lol first to help i will mark brainleist

Answers

-3/5

Hope this helped ;)

Tammy says the quotient of 781 = 6 is 130 r1.
Use multiplication to check Tammy's answer.

Answers

130 x 6 = 780
Add the remainder of one and you get 781

What are the coordinates of point A?

A (8,-6)
B (-6,8)
C (-5,7)
D (7,-5)

Answers

(7,-5) because you do (x,y) and well if you go down the line of x and go to 7 you see that A is below it and you go down 5 so it makes it -5
it’s c or d good luck

In how many ways can a committee of three men and two women be formed from a group of nine men and nine ​women?
A committee of three men and two women can be formed from a group of nine men and nine women in ______ different ways.

Answers

can you explain more about the details

C=1,9 and d=7,-7 find the midpoint of CD

Answers

Answer:

The midpoint of CD is (4, 1).

Answer:

4,1

Step-by-step explanation:

ANSWER QUICKLY !

Drag each tile to the table to multiply
(6x - y)(2x – y +2).
-

Answers

Top row: 12x^2, -6xy 12x
bottom row: -2xy, -y^2, -2y

How do you find the volume of this fish tank 3feet 3feet 5feer

Answers

Answer:

Length x width x height (LxWxH)  the answer is 45

Step-by-step explanation:

Matt has soccer practice on may4. He will practice every fourth day after that. Jacob begins baseball practice on may3 and continues to practice every third day after that.what will be the first date on which they both have practice

Answers

Answer:

May 12th

Step-by-step explanation:

For Matt's practice you multiply by 3 and for Jacob's practice you multiply by  4 to get both practices to 12.

5. At a pizza party, James and his friends ate three and one-fourth cheese pizzas and two and
three-fourths pepperoni pizzas. How much pizza did they eat in all?

Answers

Answer:

how much friends cuz you can calculate without the total amount of people

Is it's a function yes or no

Answers

No because there are 2 outputs
There can only be one output for every input

Fred used a number line to find the value of (−3) + (−5). Which of these number lines did he use?

Answers

Answer:

A

Step-by-step explanation:

A pair of sunglasses is on sale for %26. The original price of the sunglasses was $40. What percent of the orignal prces is sale price?

Answers

Answer:$32 dollars

Step-by-step explanation:

Answer:

We are trying to find what PERCENT the sale price is of the sale price.  To do that, we will have to divide the sale price by the original price and simplify.

In percent form, it is 65%.

The sale price, $26, is 65% of the original price, $40.

Step-by-step explanation:

hopefully this answers your question

Do these pairs of values (x and y) represent two quantities that are proportional?
HELP ME PLEASE

Answers

Yes, it is proportional. The answer would be B.

Explanation:

The common difference in the X factors is 2, and t he common difference in the y factors is 1.

Answer:

its b but i am not sure because my text was different

please help with this question ty

Answers

Answer:

C=13 I think this is the right answer

i think the answer is c :)

Please help me i’ll give u brainiest!!

Answers

ok what do you need help with

the answer would be C because it is the only one that makes sense

Pls need help ASAP i need done before 11:59

Answers

Answer:

oop uh so just multiply the fraction by 5 sorry if i get it wrong i remeber doing this question in 3rd grade but kinda forgot

Step-by-step explanation:

ontent attribution Question Translate and simplify: the sum of 9 and -16 increased by 4. ​

Answers

Answer:

Now we'll reverse the process and translate word phrases into ... Eight more than means eight added to your present age. ... 9z−7. exercise 3.4.23. Translate each word phrase into an algebraic ... To take a sum, we look for the words of and and to see what is being added. ... Have questions or comments?

Step-by-step explanation:

Solve for x. for the triangel below

Answers

Answer:

if you can show the triangle, that would be much helpful...

Can someone help me simplify this equation (explain how you did it please)

Answers

This is the solution step by step , hope it helps ! I’d appreciate it if you put a thanks And a brainiest !!!

Diane purchased a computer that was originally sold for 1252.00 it was discounted 32% how much did she pay

Answers

Answer:

400.64 is your answer

Step-by-step explanation:

I need brainlyest PLZ!!!!

Find x step by step please.

Answers

Answer:

55

Step-by-step explanation:

if oak trail is 125 then pine trail is also 125 and we know that a straight line is 180 so 180-125=55

Answer:

55 degrees

Step-by-step explanation:

180 degrees  - 125 degrees

The line with 125 is a flat line which is 180 degrees. The oak trail and pine trail are parallel which means they both are 180 degrees. So 180-125 is x.

The amount of snowfall falling in a certain mountain range is normally distributed with a mean of 70 inches, and a standard deviation of 10 inches. What is the probability that the mean annual snowfall during 64 randomly picked years will exceed 72.8 inches

Answers

Answer:

The probability that the mean annual snowfall during 64 randomly picked years will exceed 72.8 inches is 0.3897

Step-by-step explanation:

Mean =[tex]\mu = 70 inches[/tex]

Standard deviation =[tex]\sigma = 10 inches[/tex]

We are supposed to find the probability that the mean annual snowfall during 64 randomly picked years will exceed 72.8 inches

We will use z-score formula :

[tex]Z = \frac{x-\mu}{\sigma}\\Z=\frac{72.8-70}{10}\\Z=0.28[/tex]

We will use z table

[tex]P(X \geq 72.8)=1-P(X\leq 72.8)=1-0.6103=0.3897[/tex]

Hence  the probability that the mean annual snowfall during 64 randomly picked years will exceed 72.8 inches is 0.3897

What does 14 + 7 = ???

Guys help!!!

Ples halp!

mef neesd helpepep¡

mefnei fneafi eisafneioeale¡¡¡¡¡¡¡

Answers

Answer:

21

Step-by-step explanation:

:)

21 is the answer

Hope this helps

Please help me answer this question please

Answers

Answer:

BCA

Step-by-step explanation:

3⋅3/5 plz i need the answer fast

Answers

Answer:

1.8

Step-by-step explanation:

Answer:

9/5

Step-by-step explanation:

3 * 3 = 9

9/5

Please mark brainliest, thank you!!

12 women and 18 men are on the faculty in the Computer Science department at Whatsamatta U. a. How many ways are there to select a committee of 6 members of the department if at least two women must be on the committee

Answers

Answer:

183,600 ways

Step-by-step explanation:

TOPIC : PERMUTATION & COMBINATION

Question: In how many ways can a committee of 6 members - with at least 2 women - be selected?

In other words, how many ways are there, to select a committee of 6 members including at least 2 women?

* Permutation deals with the orderly arrangement of items while Combination deals with the manner of selection of items from a group, without regard to order. In other words, this question has to do with Combination.

There are 12 women and 18 men and you're to select 2 women and 4 men.

The combination for men and women will be found separately and then multiplied together.

WOMEN: 2 OUT OF 12

12! ÷ [2! × (12 - 2)!]  =  12! ÷ [2! 10!]

= 12×11×10×9×8×7×6×5×4×3×2×1   = 479,001,600  =  66

  2×1   ×10×9×8×7×6×5×4×3×2×1       7,257,600

MEN: 4 OUT OF 18

18! ÷ [4! (18 - 4)!]  =  18! ÷ [4! 14!]

= 18×17×16×15×14×13×12×11×10×9×8×7×6×5×4×3×2×1  = 3,060

  4×3×2×1   ×14×13×12×11×10×9×8×7×6×5×4×3×2×1

ANSWER:

₁₂C₂  ×  ₁₈C₄  = 66 × 3060  = 183,600

TIME REMAINING
57:09
Solve for x.

6(x – 1) = 9(x + 2)

x = –8
x = –3
x = 3
x = 8

Answers

Answer:

-8

Step-by-step explanation:

plug in -8 for x

What is 2/2 subtracted by 1/2?

Answers

Answer:

1/2

Step-by-step explanation:

Combine the fractions by finding a common denominator.

2/2-1/2=1/2

1/2+1/2=2/2

Answer:

Extract form- 1/2

Decimals- 0.5

Step-by-step explanation:

If an airplane traveled 800 miles in 4 hours,
how many miles can it travel in 5 hours at
the same rate? Write a proportion and solve.

Answers

Answer:

1,000

Step-by-step explanation:

800/4=200

200 times 5=1,000

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