Question

There are 288 boys & 432 girls in a school. How many boys would be in a sample of 50 from the school? ​

Answer 1

20

Explanation:

First we calculate the percentage of boys

`P_B = (288)/(288+432) = (288)/(720) = 0.4 => 40\% \ $of all students are male.\\$S(50b) = 0.4 \cdot 50 = 20`