SOLUTION: A box contains n tickets marked 1 through n. Two tickets are drawn in succession without
replacement. Determine the probability that the numbers on the tickets are consecuti
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replacement. Determine the probability that the numbers on the tickets are consecuti
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Question 476890: A box contains n tickets marked 1 through n. Two tickets are drawn in succession without
replacement. Determine the probability that the numbers on the tickets are consecutive integers. Answer by robertb(5830) (Show Source):
You can put this solution on YOUR website! If there are n = 2 tickets only, the probability is 1. So we exclude this case. Assume that .
There are 2(n-1) possible pairs of consecutive integers in two drawings. There are n(n-1) ways of drawing two pairs of tickets. Hence the probability is .
