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

Answer:

20

Step-by-step explanation:

First we calculate the percentage of boys

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