Using Optimum Video Poker, or most any other VP game analyzer, enter such a hand and analyze it. We find that there are 615 quads out of the 16215 possible outcomes, or about one chance in 26.365
Dan
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Dan Paymar, developer of "Optimum Video Poker" software
Visit my web site at http://www.OptimumPlay.com
"Chance favors the prepared mind" ~ Louis Pasteur