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From a deck of (52) cards, a (5)-card hand is to be chosen with at least (1) ace. How many hands are possible?

Answer and explanation

Correct answer: 886656

Use the complement method for hands containing at least one ace. The total number of 5-card hands is \(\binom{52}{5}=2598960\). Hands with no ace are selected from the remaining 48 cards, giving \(\binom{48}{5}=1712304\). Therefore, the required number is \(\binom{52}{5}-\binom{48}{5}=886656\). Option A counts hands with exactly one ace only, whereas the question also includes hands with two, three, or four aces. Exam tip: for “at least one” conditions, counting the complement is often quickest.

Related tags

CombinationsCard DeckComplement CountingAt Least OneAcePermutations And CombinationsMathematicsClass 11 Mcq

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