- A
- B
- C
- D
Step-by-Step Solution
Blue pens = , so the stand holds 9 + 6 + 14 = 29 pens. P(blue) = comes from ignoring the "4 less" and taking 18 blue pens in a stand of 33; and answer for the black and the red pens.
Answer: D)
A shop counter in Kochi has a pen stand holding 9 black pens, 6 red pens and some blue pens. The number of blue pens is 4 less than twice the number of black pens. A customer pulls out one pen at random. What is the probability that it is blue?
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