你好!用数字2,3,5,6,9可以组成60个无重复数字的三位数。解题:5x4x3=20x3=60(个)
5*4*3=60用数字2,3,5,6,9可以组成60个无重复数字的三位数
P5取3=5!/2!=5×4×3=60
5×4×3=60答:可以组成60个
5×4×3=60 答:60个。