SOLUTION: this is a probability question:
in how many ways can seven ariplanes line up for a departure on a runway if the plane with the greatest number of passengers must depart first?
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in how many ways can seven ariplanes line up for a departure on a runway if the plane with the greatest number of passengers must depart first?
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Question 181525: this is a probability question:
in how many ways can seven ariplanes line up for a departure on a runway if the plane with the greatest number of passengers must depart first? Answer by Mathtut(3670) (Show Source):
You can put this solution on YOUR website! if one airplane is fixed, that is the plane with the most passengers has to be first, then there is only 6! ways to line up the planes that are left
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so 6! which is 6*5*4*3*2*1=720 different ways
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