Direction: Study the following information carefully to answer the question the question that follow.
A box contains 2 blue caps, 4 red caps, 5 green caps and 1 yellow cap.
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If one cap is picked at random, what is the probability that it is either blue or yellow?
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- 2/9
- 1/4
- 3/8
- 6/11
Correct Option: B
Total number of caps = 12
n(s) = 12c1 = 12
Out of ( 2 blue + 1 yellow) caps, number of ways to pick one cap n(E) = 3c1 = 3
∴ Required probability = p(E) = n (E) / n(s) = 3/12 = 1/4
