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2 years ago

2/5 of a class are girls. 3/4 of the boys are called Paul. What fraction of the whole class is not called Paul?

Mathematics

2 answers:

Novay_Z [31]2 years ago

7 0

Answer:

1/4

Step-by-step explanation:

3/4 + 1/4 = 4/4

irina [24]2 years ago

6 0

Answer:

3/20

Step-by-step explanation:

If 2/5 are girls then to find boys, calculate

1(the whole class) - 2/5 which is 3/5.

Then if 3/4 of the boys are called Paul, that means the remaining 1/4 aren't.

1/4 × 3/5 = 3/20

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Radda [10]

Answer

Sol: The correct answer is b. three planes that contain point B are ABD, AEF and DHF.

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3 years ago

In how many ways can a committee of 5 people be chosen from a total of 30 possible people?

Stolb23 [73]

Answer: 142506

Step-by-step explanation:

Given : The total number of choices for people in committee = 30

The number of people need to be chosen =5

Since , here order doesn't matter, so we use combination.

The combination of r things taking from n at a time is given by :-

$C(n,r)=\dfrac{n!}{(n-r)!r!}$

Now, the number of possible combinations of 5 people be chosen from a total of 30 possible people :-

$C(30,5)=\dfrac{30!}{(30-5)!5!}\\\\=\dfrac{30\times29\times28\times27\times26}{120}\\\\=142506$

Hence, the committee can be made in 142506 ways.

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2 years ago

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FrozenT [24]

Answer:

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2 years ago

A wheel has a diameter of 28 inches. What is the approximate distance around the outside of the wheel? Use 3.14 for pi.

prohojiy [21]

Answer:

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2 years ago

A tutor work with 3 students. The oldest student is 6 years oldder then the middle student, and the youngest student is 3 years

Dennis_Churaev [7]

Answer:

9 years old.

Step-by-step explanation:

Since the ages of all of these students are being represented in relation to the middle student's age then we can create formulas for each student and then apply them to the formula for the sum of their ages and solve for the middle child's age (M) like so... (oldest child's age is represented by variable O and youngest child's age is represented by variable Y)

O = M + 6

Y = M - 3

30 = (M+6) + M + (M-3) ... combine like terms

30 = 3M + 3 ... subtract 3 from both sides

27 = 3M ... divide both sides by 3

9 = M

Now we know that the middle child is 9 years old.

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2 years ago