In the parking area of a supermarket, there are 40 parking places, numbered 1–40. At a particular instant, 15 places are occupied. Assuming that all places are equally likely to be occupied, the probability that exactly one of the parking places numbered 1 and 2 is occupied equals

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40 13 40 (19) 15 381 40 (d) (4) (34) (33) + (34) 40 15 (e) (49) (b) (c) (49)