Combination
2012-01-08 4:46 pm
5 men and 5 women going for dancing. Find the no. of pairs of man/woman that can be formed?
回答 (2)
2012-01-08 7:17 pm
✔ 最佳答案
Solution: There are 5 choices for the first man,then 4 choices for the second man,
and so on
Total 5! = 120 no. of pairs of couples can be formed.
2012-01-10 2:59 am
every man or woman has 5 choice to match, therefore the combination is
5 x 5 = 25
or
to choose one from the men : 5C1
one from the women : 5C1
the combination : 5C1 x 5C1 = 5 x 5 = 25
5 x 5 = 25
or
to choose one from the men : 5C1
one from the women : 5C1
the combination : 5C1 x 5C1 = 5 x 5 = 25
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