Question

Of 686 students in a school, 3 by 7 are girl students and the rest are boys. How many boys study in
the school? ​

Answer 1

Answer:

392

Step-by-step explanation:

Given -

Total students in a school = 686

Girls in school = 3/7 of total students

To find -

Boys in school

Solution -

Because girls in school are 3/7 so boys in school are 4/7

number of boys =

$\frac{4}{7} \: of \: 686 \\ = \frac{4}{7} \times 686 \\ = \frac{4 \times 686}{7} \\ = 4 \times \frac{686}{7} \\ = 4 \times 98 \\ = 392$

Hence total number of boy students in school is 392.

hope it helps.