An urn contains 3 red, 2 blue, and 5 green marbles. If we pick 4 marbles with replacement and count the number of red marbles in the 4 picks, the probabilities associated with this experiment are P(0) = 0.24, P(1) = 0.41, P(2) = 0.265, P(3) = 0.076, and P(4) = 0.009. The probability of less than 2 red marbles is:
A)0.41.
B)0.65.
C)0.915.
D)0.991.

Question

Quizplus · Accepted Answer

The probability of less than 2 red marbles is the sum of P(0) and P(1), which is 0.24 + 0.41 = 0.65. Therefore, the best choice is B.

An Urn Contains 3 Red, 2 Blue, and 5 Green