At a birthday party, 9 girls aged 3,2,5,3,4,5,6,5 were present. If a girl is selected at random, what is the probability that she is 5 years old.

Answer 1

I only see 8 ages, so I'll go with that.
8 girls, 3 aged 5
so P(5) = 3/8
If you come up with another age, then adjust for that.