Question

the ratio of boys to girls in a school is 4:5 there are 22o boys in the school. How many students attend the school​

Answer 1

495 students

Explanation:

`220 \: boys \\ 4:5 = 4 + 5 \\ boys \: = (4)/(9) * x = 220 \\ = (4x)/(9) = (220)/(1)`

`4x = 1980 \\ (4x)/(4) = (1980)/(4) \\ x = 495 \\ total \: no \: of \: students \: = 495 \\`

Answer 2

495 students

Explanation:

The 4 part of the ratio is the number of boys.

Divide the number of boys by 4 to find the value of one part of the ratio.

220 ÷ 4 = 55 ← value of 1 part of the ratio, thus

5 parts = 5 × 55 = 275 ← number of girls

Number of students = 220 + 275 = 495