Question

A bag contains 5 red balls and 6 green balls. You plan to select 2 balls at random. Determine the probability of selecting 2 green balls.

The problem is to be done without replacement. Use combinations to determine the probability

Answer 1

Explanation:

first pick has probability

`(6)/(11)`

second pick has probability

`(5)/(10)`

combined probability is

`(30)/(110) = (3)/(11)`