(b+5)/(b+2) = 5/4
b = 10
B. 10+15 = 25
There are 5 more girls than boys in a class.
If 2 boys join the class, the ratio of girls to boys will be 5:4. Find
(a) the number of girls in the class.
(b) the total number of pupils in the class.
(c) the probability of selecting a boy as the class perfect .
1 answer
1 answer