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 at least 1 red marble is:
A)0.24.
B)0.76.
C)0.009.
D)0.41.

Question

Quizplus · Accepted Answer

The probability of at least 1 red marble is equal to 1 minus the probability of picking 0 red marbles. 
P(at least 1) = 1 - P(0)
P(at least 1) = 1 - 0.24
P(at least 1) = 0.76

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