<PRE><B>Question 202517</B>
Dawing at least 1 spade in a series of 4 consecutive draws when the card is returned to the deck after each draw and the deck is reshuffled. What has confused me is that we only need to get 1 spade in 4 draws.
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Note: P(no spade on a single draw) = (3/4)
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P(at least 1 spade in 4 draws) = 1 - P(no spades in 4 draws)
= 1 - (3/4)^4
= 1 - (81/256)
= 175/256
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Cheers,
Stan H.</PRE>