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A box has 20 pens of which 2 are defecti...

A box has 20 pens of which 2 are defective. Calculate the probability that out of 5 pens drawn one by one with replacement, at most 2 are defective.

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To solve the problem of finding the probability that out of 5 pens drawn one by one with replacement, at most 2 are defective, we can follow these steps: ### Step 1: Identify the total number of pens and defective pens - Total pens = 20 - Defective pens = 2 - Non-defective pens = 20 - 2 = 18 ### Step 2: Define the probabilities ...
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