Question

I GIVE MEDALS!!! SO PLEASE HELP ME.

The data represents the number of live multiple-delivery births (three or more babies) in a particular year for women 15 to 54 years old. use the data to determine the following.

Age,"Number of Multiple Births"
15-19 , 93
20-24 , 511
25-29 , 1622
30-34 , 2824
35-39 , 1854
40-44 , 372
45-54 , 115

(a). determine the probability that a randomly selected multiple births for women 15-54 years old involved a mother 30 to 39 years.
(b),(c),(d): ill explain after i get (a) down.

please explain how to solve this. or help me solve it. because i'm sort of on a time schedule.