Question

A middle school has 200 boys and 300 girls enrolled in the seventh-grade. The principal randomly selects 45 seventh-grade students to take a lunch survey. How many of the seventh-grade students selected for the survey should the principal expect to be boys?

Answer 1

Answer:18

Explanation:

Given

The school has 200 boys and 300 girls

The ratio of boys and girls is 2:3

If 45 seventh grade students are selected then the ratio of boys and girls remain the same

suppose there are 2x boys and 3x girls, such that ratio is 2:3

`\Rightarrow 2x+3x=45\\\Rightarrow 5x=45\\\Rightarrow x=9`

No of the boys are
`2x=2* 9=18`