A class contains 10 boys and 20 girls. Five people are chosen randomly. What is the probability that all five are boys? All girls?

Question

A class contains 10 boys and 20 girls. Five people are chosen randomly. What is the probability that all five are boys? All girls?

Answer 1

For the five boys

(10/30)(9/29)(8/28)(7/27)(6/26)

 

For the five girls

(20/30)(19/29)(18/28)(17/27)(16/26)