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Twenty coupons are numbered 1,2,3......,...

Twenty coupons are numbered 1,2,3......, 20 respectively. Four coupons are selected at random without replacement. If maximum and minimum numbers on selected coupons are 12 and 3 respectively. Then the probability that the maximum number on the remaining selected coupons is 9 is (1)`5/(56)` (2) `5/(28)` (3) `(15)/(28)` (4) `8/(56)`

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