Question 524688
Naoko found a deck of cards that had been dropped onto the floor. She picked up at least 1 card. She may have pick up 1, all 52, or any number in between. How many possible combinations are there for what she picked up? 
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Each card is either picked up or not picked up:
That gives 2^52 combinations including the empty combination.
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So there are 2^52 - 1 combination that contains at least 1 card.
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Cheers,
Stan H.
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