The average number of a, B and C is 40, the ratio of a to B is 3:2, C is equal to half of B, what are the numbers of a, B and C

The average number of a, B and C is 40, the ratio of a to B is 3:2, C is equal to half of B, what are the numbers of a, B and C

The ratio of a to B is 3:2, and the ratio of C to B is half of that of B, so the ratio of a to B to C is 3:2:1
3+2+1=6 40x3=120 120/6=20
A 20x3 = 60 B 20x2 = 40 C 20x1 = 20