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Question

A card is drawn at random from a well shuffled deck of playing cards. Find the probability that card drawn is-
1. A card of heart or a king.
2. A black queen.
3. neither an ace nor a jack.
4. either an ace or a jack. ​

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Solution

Total number of cards in a deck = 52Total number of possible outcomes = 521.Number of cards of heart = 13Number of kings = 4Number of king of heart = 1Number of favourable outcomes = 13 + 4 - 1 = 16Pa heart or a king = Number of favourable outcomesTotal number of possible outcomes = 1652 = 4132.Number of black queens = 2Number of favourable outcomes = 2Pa black queen = Number of favourable outcomesTotal number of possible outcomes = 252 = 1263.Number of aces = 4Number of jacks = 4Number of favourable outcomes = 52 - 4 + 4 = 52 - 8 = 44Pneither an ace nor a jack = Number of favourable outcomesTotal number of possible outcomes = 4452 = 11134.Number of aces = 4Number of jacks = 4Number of favourable outcomes = 8Peither an ace or a jack = Number of favourable outcomesTotal number of possible outcomes = 852 = 213

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