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Binomial Probability Theorem

The probabili...

Question

The probability that an event does not happen in one trial is 0.8.The probability that the event happens atmost once in three trails is

A

0.896

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B

0.791

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C

0.642

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D

0.592

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Solution

The correct option is A 0.896
Probability of not happening of trials=0.8
Probability that event happens at most once inn three trial
=P(0 times)+p(1 times in three trial)
=0.80.80.8+30.20.8*0.8
=0.896

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