A. 9

B. 12

**C. 15**

D. 18

**Step-by-step explanation:**

**Concept:**

A ratio in mathematics shows how many times one number is contained in another.

A ratio can have any number of quantities, such as counts of people or things or measurements of length, weight, time, etc. Both numbers must be positive in most situations.

A ratio can therefore be thought of as an ordered pair of integers, a fraction with the first number in the numerator and the second in the denominator, or as the value represented by this fraction.

**Given:**

In a certain class the ratio of men to women is

In a class there are people.

**Find:**

To find the number of women in a class.

**Solution:**

Given that the ratio of men and women in a class is** **

Let us assume the ratio be and

Given the total no of people in a class is

We have

Hence

Substituting

we get

**The number of women in a class is **.