Determine the number of 5-card combinations out of a deck of 52 cards if each selection of 5 cards has exactly one king.
From a deck of 52 cards, 5-card combinations have to be made in such a way that in each selection of 5 cards, there is exactly one king.
In a deck of 52 cards, there are 4 kings.
1 king can be selected out of 4 kings in `""^4C_1` ways.
4 cards out of the remaining 48 cards can be selected in `""^48C_4` ways.
Thus, the required number of 5-card combinations is `""^4C_1 xx ""^48C_4`
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