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(48/47) x (47/46) x (46/45) x . . . . . x (3/2) x (2/1) =

(48 x 47 x 46 x . . . . . x 3 x 2) / (47 x 46 x 45 x . . . . . x 2 x 1) =

48.

Every factor less than 48 in the numerator is canceled by the same number

appearing once in the denominator.

Another way to write this thing is (48!)/(47!) which is 48.

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14y ago

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