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A bag contains 50 tickets numbered 1, 2, 3, ... 50 of which five are drawn at random and arranged in ascending order of magnitude (x_(1) < x(2) < x_(3) < x_(4) < x_(5)). The probability that x_(3) cdot x_(4) = 85 is |
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Answer» `(.^(48)C_(3))/(.^(50)C_(5))` Required probability = `(.^(4)C_(2) xx .^(33)C_(1))/(.^(50)C_(5)) = 99/(5.^(49)C_(4))`. |
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