[計量] 請教排列組合問題
麻煩各位教我怎麼解.....@@
我排列組合真的都忘光了...QQ
Two different integers are to be selected from a set of 10 different integers
in which half of the integers are even and half are odd.
How many of the 45 possible selections consist of
one even and one odd integer?
ANS: 25
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08/06 16:18, , 1F
08/06 16:18, 1F
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08/06 16:23, , 2F
08/06 16:23, 2F
推
08/06 16:59, , 3F
08/06 16:59, 3F
→
08/06 16:59, , 4F
08/06 16:59, 4F
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08/06 19:31, , 5F
08/06 19:31, 5F
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