用1,2,3,4,5排成一排组成没有重复数字的五位数,并且奇数排在奇数位

用1,2,3,4,5排成一排组成没有重复数字的五位数,并且奇数排在奇数位置,这样的五位数有(    )

A.12个                 B.24个            C.60个             D.120个

答案

A


解析:

奇数排在奇数位上的排法有种,两个偶数的排法有种,所以满足条件的五位数共有=12(个).

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