Multiple Choice Question: A bag contains 20 tennis balls, of which four are defective. If two balls are selected at random from the bag, what is the probability that both are defective?

A bag contains 20 tennis balls, of which four are defective. If two balls are selected at random from the bag, what is the probability that both are defective?

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Orphaned Multiple Choice Questions (MCQ) due to changes of exam system.

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