Question
Integers 11, 12, 13, 14 are written on 4 cards they are
well shuffled. Two cards are taken at random without replacement. What is the probability that the sum is at least 25?Solution
Out of these 12 combinations, four are having the sums at least 25. Probability of picking two cards, whose sum is at least 25 will thus be 8/12 = 2/3
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