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Probability Distribution

The probabili...

Question

The probability of an event happening in one trial of an experiment is 0.6. Three independent trial are made. The probability that the event happens at least once is:

A

0.432

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B

0.064

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C

0.936

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D

0.568

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Solution

The correct option is C 0.936
Probability of success in one trial = 0.6
$∴$ P (at least one success in 3 trails)
= 1 – P (Failure in all 3 trials)
$= 1 - (0.4)^{3} = 1 - 0.064 = 0.936$

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