In a game of poker, what is the probability that a

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The number of ways that a five-card can be taken in 52 -cards is, .

In 9 ways you can take a straight. But "Ace" is considered as a small number in some games and a big number in some games.

Then can take a straight in 10 ways. If select a straight five cards,

First card can be taken in 4 ways, the second card can be taken in 4 ways, the third card can be taken in 4 ways, the fourth card can be taken in 4 ways and the fifth card can be taken in 4 ways.

Therefore, total number of ways are .

Since, it needs a straight 5 cards in unbroken numerical sequence, Discard Ace, Knave, Jack, Queen. These are 4.

To select a straight 5 cards in unbroken numerical sequence is, .

Therefore, total number of ways are .