A container has 23 marbles 8 are red and 15 are green Determ

A container has 23 marbles, 8 are red and 15 are green. Determine the probability that if 4 marbles are selected from the container, at least 2 will be green.

A. 1.1172 B. 0.6521 C. 0.1027 D. 0.8972

Solution

P(at least 2 gree) = 1 - P(1 green) - P(no green)

= 1 - (15c1*8c3)/23c4 - 8c4/23c4

= 1 - (15*56)/8855 -70/8855

= 0.8972

Option D