Correct option is A
Given:
Total apples = 1200
Each boy received thrice as many apples as the number of boys.
Solution:
Let the number of boys be x.
Each boy received 3x apples.
Total apples distributed = Number of boys × Apples each boy received:
x × 3x = 1200
= 1200
=
= 400
x =
x = 20
The number of boys in the group is 20.