Question

A jar contains five blue marbles and three red marbles. Suppose you choose a marble at​ random, and do not replace it. Then you choose a second marble. Find the probability of the following event. Both of the selected marbles are red.

Answer 1

For the first event
P=3/(5+3)=3/8=0.375


Total became 2 red and 5 blue .... 7 total

For the second event
P=2/(5+2)=2/7= 0.2857