新gre數(shù)學考點標準偏差和排列組合gre數(shù)學(完整版)
【正文】 4)!)=50!/(4!*46!)=50*49*48*47/24=230300. Remember: This does not apply if there are identical objects. Permutation of Objects The number of ways n distinct objects can be ordered is n!. Example: Number of ways 6 people can from a queue is 6!. Number of ways 5 different cars can be parked in
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