Chapter 12.7, Problem 34STP

To determine

Calculate the number of females in the room.

Answer to Problem 34STP

The number of female is $20$ .

Explanation of Solution

Given:

It is given in the question that the ratio of males to females in a classroom is $3:5$ and the total number of students is $32$ .

Concept Used:

In this, use the concept of algebra such that taking the variable x and y .

Calculation:

Let the number be x , then male will be $3x$ and female will be $5x$ .

According to question,

  $\begin{array}{l}3x+5x=32\\ 8x=32\\ x=\frac{32}{8}\\ x=4\end{array}$

So, the number of males is $5x=5(4)=20$ .

Conclusion:

The number of female is $20$ .