Question 238007
nCr=n!/((n-r)!r!) Combination of n things taken r at a time.
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A)( 5C3 * 5C2)/10C5 = 10*10/252=.397
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B) ((5C2 * 5C2)/10C4) * 1/2 = (10*10)/210 * 1/2 =.238
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C) 1/10 if no cards have been drawn yet.
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D) 5C3 / 10C3 = 10/120 = 1/12
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Ed