When an opinion poll calls residential telephone numbers at

Reference no: EM13615069

When an opinion poll calls residential telephone numbers at random, only 20% of the calls reach a live person. You watch the random dialing machine make 20 calls.

What is the probability (0.0001) that exactly 2 calls reach a person?

What is the probability (0.0001) that 2 or fewer calls reach a person?

Reference no: EM13615069

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