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the probability of happening an event A in one trial is 0.4. The probability that event A happens at least once in three independent tials is ?

    • Posted by Priyanshu Srivastava 7 years ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Priyanshu Gaur 7 years ago

    The probability that event A occurs at least once.. First of all we have to find the probability that A doesn't occur any time So p(A doesn't occur in one trial) =1-0.4 =0.6 (0.6 ×0.6×0.6) Therefore ans. Is 1 -(0.6)^3

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