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2 years ago

The mean of 25 test scores was calculated as 81. But, it turned out that one of the scores was misread

1 answer:

Studentka2010 [4]2 years ago

3 0

The correct answer is 82, because if you multiply 81 by 25 you get 2,025, you then subtract 72, add 97, and divide it all by 25

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Answer:

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Step-by-step explanation:

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2 years ago

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Find the hupotenuse if the legs are 3 and 4

natita [175]

Answer:

None of these

Step-by-step explanation:

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3 years ago

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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

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Sunny_sXe [5.5K]

Answer:

probably the furthest graph to the left.

Step-by-step explanation:

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7 0

2 years ago

If two supplementary angles are in the ratio of 4:5 the measure of the larger angle is

dimulka [17.4K]

Answer:

Step-by-step explanation:

Let the angles be 4x , 5x

4x + 5x = 180 { supplementary}

9x = 180

x = 180/9

x = 20

Larger angle= 5x = 5* 20 = 100

6 0

2 years ago