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One card is drawn from, a well-shuffled deck of 52 cards. Find the probability of getting (i) a king of red colour (ii) a face card (iii) a red face card (iv) the jack of hearts (v) a spade (vi) the queen of diamonds. |
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Answer» Total number of cards = 52. ∴ Number of all possible outcomes in drawing a card at random = 52. i) Number of outcomes favourable to the king of red colour = 2(♥ K, ♦ K) ∴ Probability of getting the king of red colour P(E) = \(\frac{No.\,of\,favourable\,outcomes}{Total\,no.\,of\,outcomes}\) \(=\frac{2}{52}=\frac{1}{26}\) ii) Number of face cards in a deck of cards = 4 × 3 = 12 (K, Q, J) Number of outcomes favourable to select a face card = 12. ∴ Probability of getting a face card = \(\frac{No.\,of\,favourable\,outcomes}{Total\,no.\,of\,outcomes}\) \(=\frac{12}{52}=\frac{3}{13}\) iii) Number of red face cards = 2 × 3 = 6. ∴ Number of outcomes favourable to select a red face card = 6. ∴ Probability of getting a red face = \(\frac{No.\,of\,favourable\,outcomes}{Total\,no.\,of\,outcomes}\) \(=\frac{6}{52}=\frac{3}{26}\) iv) Number of outcomes favourable to the jack of hearts = 1. ∴ Probability of getting jack of hearts = \(\frac{No.\,of\,favourable\,outcomes}{Total\,no.\,of\,outcomes}\) = \(\frac{1}{52}\) v) Number of spade cards = 13 ∴ Number of outcomes favourable to ‘a spade card’ = 13. ∴ Probability of drawing a spade = \(\frac{No.\,of\,favourable\,outcomes}{Total\,no.\,of\,outcomes}\) \(=\frac{13}{52}=\frac{1}{4}\) vi) Number of outcomes favourable to the queen of diamonds = 1. ∴ Probability of drawing the queen of diamonds = \(\frac{No.\,of\,favourable\,outcomes}{Total\,no.\,of\,outcomes}\) = \(\frac{1}{52}\) |
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