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andreyandreev [35.5K]

3 years ago

13

Marthy has exactly five blue pens,six black pens,and four red pens in his knapsack. if he pulls out one pen at random from his k

napsack.what is the probability that the pen is either red or black?

1 answer:

Arte-miy333 [17]3 years ago

5 0

(red pens + black pens) / total pens
(4 + 6) / 15 = 10/15 = 2/3

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