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Card is drawn from a pack of 52 cards. A...

Card is drawn from a pack of 52 cards. A persons bets that it is a spade or an ace. What are the odds against him of winning this bet?

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Number of cards which are spade or ace = 13 + 4 - 1 = 16
So, probability of the card being a spade or an ace = `(16)/(52) = (4)/(13)`
Hence, odds in favour is 4 : 9.
Therefore, odds against him of winning the best is 9 : 4.
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