Three friends board an airliner just before departure time. There are only 11 seats left, 4 of which are aisle seats. How many ways can the 3 people arrange themselves in available seats so that at least one of them sits on the aisle?
Three friends board an airliner just before departure time. There are only 11 seats left, 4 of which are aisle
seats. How many ways can the 3 people arrange themselves in available seats so that at least one of them sits on the aisle?
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