5个球放入7个不同的盒子内,以下情形,方法各有几种?
(i) 球相异,每盒最多放一球。
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Mathematics
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Professional Development
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7 questions
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1.
FILL IN THE BLANK QUESTION
1 min • 1 pt
5个球放入7个不同的盒子内,以下情形,方法各有几种?
(i) 球相异,每盒最多放一球。
2.
FILL IN THE BLANK QUESTION
1 min • 1 pt
5个球放入7个不同的盒子内,以下情形,方法各有几种?
(ii) 球相异,每盒球数不限。
3.
FILL IN THE BLANK QUESTION
1 min • 1 pt
5个球放入7个不同的盒子内,以下情形,方法各有几种?
(iii)球相同,每盒最多放一球。
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
5个球放入7个不同的盒子内,以下情形,方法各有几种?
(iv)球相同,每盒球数不限。
5.
FILL IN THE BLANK QUESTION
1 min • 1 pt
5个球放入4个盒子内,以下情形,方法各有几种?
(i) 球相异,盒子相同,每盒至少1球
6.
FILL IN THE BLANK QUESTION
1 min • 1 pt
5个球放入4个盒子内,以下情形,方法各有几种?
(ii) 球相异,盒子相异,每盒至少一球
7.
FILL IN THE BLANK QUESTION
1 min • 1 pt
6粒不同的球放进4个相同的盒子,每盒至少一球,其中A球和B球在一起, 有几种分法
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