Re: [計量] CAT test5 3題問題
前兩題吃光光
: ===================================================================
: 27. A photographer will arrage 6 people of 6 different heights for
: photography by placing them in two rows of three so that each
: person in the first row is standing in front of someone in the
: second row. The heights of the people within each row must
: increase from left to right , and each person standing in front
: of him or her.
: How many such arrangements of the 6 peoples are possible?
: ans : (A) 5
若以數字代表每個人高度，6最高1最矮，則僅有以下5種排法
第一種 第二種 第三種 第四種 第五種
第二排(4,5,6) (3,5,6) (3,4,6) (2,4,6) (2,5,6)
第一排(1,2,3) (1,2,4) (1,2,5) (1,3,5) (1,3,4)
以上
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推
11/05 23:13, , 1F
11/05 23:13, 1F
推
11/05 23:34, , 2F
11/05 23:34, 2F
推
11/06 00:03, , 3F
11/06 00:03, 3F
推
11/06 17:16, , 4F
11/06 17:16, 4F
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