配套习题- 分步乘法计数原理 -【青果学院】

挑战习题

1/5单选题

难度：

1.从甲地去乙地有3班火车，从乙地去丙地有2班轮船，则从甲地去丙地可选择的旅行方式有（　　）种

A	3
B	2
C	6
D	1

提示1：: IOWIhuatpemqpOino+WGs++8jOesrOS4gOatpe+8muS7jueUsuWIsOS5me+8jOaciTPnp43pgInmi6nvvIznrKzkuozmraXvvJrku47kuZnliLDkuJnvvIzmnIky56eN6YCJ5oup44CCPGJyPg0K5YWx5pyJMjxpbWcgd2lkdGg9NDcgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMEEvRDUvckJBQ0ZGTnh3TWJEZmRndkFBQUJpZVFFRDhVNDkxLnBuZyI+56eN6YCJ5oup5pa55byP44CC

正确答案：Qw==

6Kej77ya5YiG5q2l6aqk6Kej5Yaz77yM56ys5LiA5q2l77ya5LuO55Sy5Yiw5LmZ77yM5pyJM+enjemAieaLqe+8jOesrOS6jOatpe+8muS7juS5meWIsOS4me+8jOaciTLnp43pgInmi6njgII8YnI+5YWx5pyJMjxpbWcgd2lkdGg9NDcgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMEEvRDUvckJBQ0ZGTnh3TWJEZmRndkFBQUJpZVFFRDhVNDkxLnBuZyI+56eN6YCJ5oup5pa55byP44CC

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2/5单选题

难度：

2.商店里有15种上衣，18种裤子，要买上衣，裤子各一件，共有　　　种不同的选法。

A	15
B	18
C	270
D	2

提示1：: IOWIhuatpemqpOino+WGs++8jOesrOS4gOatpe+8mumAieaLqeS4iuiho++8jOaciTE156eN6YCJ5oup5pa55byP44CC56ys5LqM5q2l77ya6YCJ5oup6KOk5a2Q77yM5pyJMTjnp43pgInmi6nmlrnlvI/vvIzmoLnmja7liIbmraXkuZjms5XorqHmlbDljp/nkIbvvIzlhbHmnIkxNTxpbWcgd2lkdGg9NzAgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNDYvREMvckJBQ0UxTnh3TmJ5YjNzSUFBQUIzWExXLUcwNDI4LnBuZyI+56eN6YCJ5oup5pa55byP44CC

正确答案：Qw==

6Kej77ya5YiG5q2l6aqk6Kej5Yaz77yM56ys5LiA5q2l77ya6YCJ5oup5LiK6KGj77yM5pyJMTXnp43pgInmi6nmlrnlvI/jgILnrKzkuozmraXvvJrpgInmi6noo6TlrZDvvIzmnIkxOOenjemAieaLqeaWueW8j++8jOagueaNruWIhuatpeS5mOazleiuoeaVsOWOn+eQhu+8jOWFseaciTE1PGltZyB3aWR0aD03MCBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC80Ni9EQy9yQkFDRTFOeHdOYnliM3NJQUFBQjNYTFctRzA0MjgucG5nIj7np43pgInmi6nmlrnlvI/jgII=

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3/5单选题

难度：

3.李芳有4件不同颜色的衬衣，3件不同花样的裙子，另有两套不同样式的连衣裙. “五一”节需选择一套服装参加歌舞演出，则李芳有（　　）种不同的选择方式

A	24
B	14
C	6
D	5

提示1：: IOWFiOWIhuexu++8muS4gOexu+aYr+ihrOihoyvoo5nlrZDvvJrliIbkuKTmraXvvIzooazooaPmnIk056eN6YCJ5oup77yM6KOZ5a2Q5pyJM+enjemAieaLqe+8jOaciTTDlzM9MTLvvJvnrKzkuoznsbvmmK/ov57ooaPoo5nvvIwy56eN6YCJ5oup77yM5omA5Lul5YWx5pyJMTIrMj0xNOenjemAieaLqeOAgg==

正确答案：Qg==

6Kej77ya5YWI5YiG57G777yM5YaN5YiG5q2l6aqk44CC5LiA57G75piv6KGs6KGjK+ijmeWtkO+8muWIhuS4pOatpe+8jOihrOiho+aciTTnp43pgInmi6nvvIzoo5nlrZDmnIkz56eN6YCJ5oup77yM5pyJNMOXMz0xMu+8m+esrOS6jOexu+aYr+i/nuiho+ijme+8jDLnp43pgInmi6nvvIzmiYDku6XlhbHmnIkxMisyPTE056eN6YCJ5oup44CC

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4/5单选题

难度：

4.由数字0，1，2，3，4可组成无重复数字的两位数的个数是（　　）

A	25
B	20
C	16
D	14

提示1：: IOWNgeS9jeaVsOWtl+S4jeiDveS4ujDvvIzlhYjorqnljYHkvY3mlbDlrZfpgInmi6nvvIzmnIk056eN6YCJ5oup5pa55byP77yM5YaN6K6p5Liq5L2N5pWw5a2X6YCJ5oup77yM5pyJNOenjemAieaLqeOAgg==

提示2：: IOWFseaciTQ8aW1nIHdpZHRoPTU1IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzBBL0Q1L3JCQUNGRk54d1ZmUXR3WnlBQUFCdE9iZF9BbzgxNy5wbmciPuenjemAieaLqeaWueW8j+OAgg==

正确答案：Qw==

6Kej77ya5Y2B5L2N5pWw5a2X5LiN6IO95Li6MO+8jOWFiOiuqeWNgeS9jeaVsOWtl+mAieaLqe+8jOaciTTnp43pgInmi6nmlrnlvI/vvIzlho3orqnkuKrkvY3mlbDlrZfpgInmi6nvvIzmnIk056eN6YCJ5oup44CC5YWx5pyJNDxpbWcgd2lkdGg9NTUgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMEEvRDUvckJBQ0ZGTnh3VmZRdHdaeUFBQUJ0T2JkX0FvODE3LnBuZyI+56eN6YCJ5oup5pa55byP44CC

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5/5单选题

难度：

5.如图，用4种不同的颜色涂入图中的矩形A，B，C，D中，要求相邻的矩形涂色不同，则不同的涂法有（　　）

A	72
B	48
C	24
D	12

提示1：: IOWFiOa2gkEs5YaN5raCQu+8jOWQjua2gkMs5pyA5ZCO5raCROOAguWFiOa2gkHnmoTor53vvIzmnIk056eN6YCJ5oup77yM6Iul6YCJ5oup5LqG5LiA56eN77yM5YiZQuaciTPnp43vvIzogIzkuLrkuoborqlD5LiOQULpg73kuI3kuIDmoLfvvIzliJlD5pyJMuenje+8jOWGjea2gkTnmoTor53vvIzlj6ropoHkuI5D5raC5LiN5LiA5qC355qE5bCx5Y+v5Lul77yM5Lmf5bCx5pivROaciTPnp43jgII=

提示2：: IOWFseaciTQ8aW1nIHdpZHRoPTEwMyBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8wQS9ENS9yQkFDRkZOeHdXVFR5UnlfQUFBQjdlWmpuQUkyNTEucG5nIj7np43pgInmi6nmlrnlvI/jgII=

正确答案：QQ==

6Kej77ya5YiG5q2l6Kej5Yaz77yM56ys5LiA5q2l77ya5raCQe+8jOaciTTnp43pgInmi6njgILnrKzkuozmraXvvJrmtoJC77yM5pyJM+enjemAieaLqeOAguesrOS4ieatpe+8mua2gkMs5pyJMuenjemAieaLqeOAguesrOWbm+atpe+8mua2gkTvvIzmnIkz56eN6YCJ5oup44CC5YWx5pyJNDxpbWcgd2lkdGg9MTAzIGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzBBL0Q1L3JCQUNGRk54d1dUVHlSeV9BQUFCN2Vaam5BSTI1MS5wbmciPuenjemAieaLqeaWueW8j+OAgg==

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