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6 August, 01:42

A fair die will be rolled 12 times. what is the probability that 4, 5, or 6 is rolled less than 6 but more than 3 times

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  1. 6 August, 03:34
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    P (4,5 or 6) = 3/6=1/2 and we need to find

    P (4 times or 5 times ... getting 4,5 or 6) = P (4 times ...) + P (5 times ...)

    = (1/2) ^12 + (1/2) ^12 = (1/2) ^11

    i'm not very sure if its correct. but, u can use this as your last resort. something is better than nothing. and let me know if its right.
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