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Airida [17]
3 years ago
11

100 students take a course pass/fail. If they pass they get 4 points towards their GPA, if they fail they get 0. If 90 students

pass, what is the mean and standard deviation (to 1 decimal) of the points earned?
mean: _______a0
Standard Deviation: _________a1
Mathematics
1 answer:
zheka24 [161]3 years ago
4 0
10 of them fail so 10 of them get 0 and no points to there GPA
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In how many ways can a committee of 3 men and 4 boys be chosen from 7 men and 6 boys so as not to include the youngest boy if th
Ludmilka [50]

Answer:

There are 75 ways to form the committee.

Step-by-step explanation:

The order in which the people are chosen is not important, which means that the combinations formula is used to solve this question.

Combinations formula:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

In this question:

Considering the eldest has to be there, 2 men from a set of 6 and 4 boys from a set of 5(excluding the youngest), so:

T = C_{6,2}C_{5,4} = \frac{6!}{2!4!} \times \frac{5!}{1!4!} = 3*5*5 = 75

There are 75 ways to form the committee.

6 0
2 years ago
solve the following systems of equations. Express your answer as an ordered pair in the format(a,b), with no spaces between the
kodGreya [7K]
If you multiply the top equation by -2 you get:

-4x -14y = 14 => -4x = 14+14y

now you can plug in the -4x into the second equation:

 14+14y - 3y = -19 => 11y = -33 => y=-3

Fill in y=-3 in either equation to find x:

2x - 21 = -7 => 2x = 14 => x=7

So your ordered pair is (7,-3)
7 0
3 years ago
Casey and her two friends made $54 selling lemonade in their neighborhood. They will share their money equally. How much money w
cluponka [151]
To find out how much money Casey and her two friends will each get, we simply need to divide the total amount of income by the amount of people receiving a part of it

54 / 3 = 18

Casey and her two friends each got $18 from their lemonade stand.
Hope that helped! =)
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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

8 0
3 years ago
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