A group of 100 people to answer five questions. 81 got right on first, 91 got right on second, 85 got right on third, 79 got right on fourth, 74 got right on fifth.
Question: At least how many people got at least three questions correct?
100個人做題
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回複:100個人做題
-commentate-
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06/21/2010 postreply
10:01:52
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This is not the correct.
-adou1108-
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06/21/2010 postreply
10:07:18
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回複:This is not the correct.
-commentate-
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06/21/2010 postreply
10:08:12
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At least 91 people got at least one question correct.
-皆兄弟也-
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06/21/2010 postreply
10:26:10
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At least 91+85-100=76 people got at least two questions correct.
-皆兄弟也-
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06/21/2010 postreply
10:28:15
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At least 76+81-100=57 people got at least three questions correc
-皆兄弟也-
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06/21/2010 postreply
10:31:47
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it is wrong!
-皆兄弟也-
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06/21/2010 postreply
22:13:10
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reason :
-commentate-
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06/21/2010 postreply
13:14:17
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回複:reason :
-adou1108-
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06/21/2010 postreply
17:55:18
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回複:100個人做題
-jinjing-
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06/21/2010 postreply
20:04:52
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The inequality isn't even necessary
-ElizabethTaylor-
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06/22/2010 postreply
18:27:22
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70 is notright,the best case : 5*70=350,411-350=61,there 30 peop
-jinjing-
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06/22/2010 postreply
20:19:24
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I'm careless,410 not 411,but the inequolity is good.we can very
-jinjing-
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06/22/2010 postreply
20:29:24
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fast to get answer.(if the anwser is less than smallest number)
-jinjing-
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06/22/2010 postreply
20:33:56
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回複:I'm careless,410 not 411,but the inequolity is good.we can ve
-commentate-
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06/23/2010 postreply
07:11:14
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回複:回複:I'm careless,410 not 411,but the inequolity is good.we can
-jinjing-
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06/23/2010 postreply
09:00:17
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回複:回複:回複:I'm careless,410 not 411,but the inequolity is good.we
-commentate-
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06/24/2010 postreply
10:11:47
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回複:回複:回複:回複:I'm careless,410 not 411,but the inequolity is good.
-jinjing-
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06/27/2010 postreply
14:37:06
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回複:100個人做題
-a1lehp-
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06/29/2010 postreply
17:14:53