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Question

A card is drawn at random from a well-shuffled deck of 52 playing cards. Find the probability that the card drawn is (i) a card of spades or an ace, (ii) a black king, (iii) neither a jack nor a king, (iv) either a king or a queen.

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Solution

i)There are 13 spades including its ace and 3 other aces are there of other suits so the probability of getting spade or ace=(13+3)52=1652=413
ii)There are two black king so probability=252=126
iii) There are 4 jack and 4 king so cards which are neither jack nor king=528=44
Probability=4452=1113
iv) There are 4 king and 4 queen so probability=852=213

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