find the value of r if 12Cr is maximum
For 12Cr to be max, r factorial must be the minimum possible... Now 0 factorial and 1 factorial both are = 1. So (12-r) factorial must be equal to 1, and thus (12-r) must be = 1 or 0. This means r must be equal to 11 or 12 to get the max value of 12Cr.
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