Probability: The probability that an event A happens in one trial of an… | IIT-JEE 1980 | Yukti Vault

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IIT-JEE 1980Question 1

The probability that an event $A$ happens in one trial of an experiment is $0.4$. Three independent trials of the experiment are performed. The probability that the event $A$ happens at least once is

Probability

$0.936$$0.784$✓ Correct answer$0.904$none of these

Solution

$P=1-(0.6)^3=1-0.216=0.784$.

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