FOUR PRACTICE PROBLEMS--PERMUTATIONS AND …

There are four suits, so there are 36 possible straight flushes. 36 / 2,598,960 = 0.000013852 or one chance in 72,193. Note that this is rarer than four-of-a-kind, even four aces. So, in poker, any straight flush will beat any four-of-a-kind. ................
................