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[Issue Essay]

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题目:

Analytical!

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答案:

提问:

题目:of the 200 students at college T majoring in one or more of the sciences, 130 are majoring in chemistry and 150 majoring in biology. If at least 30 of the students are not majoring in either chemistry or biology, then the number students majoring in both biology and chemistry could be any number from a) 20 to 50 b) 40 to 70 c) 50 to 130 d) 110 to 130 e) 110 to 150 问题:这道题能理解到是用集合的知识点,但是无论怎么做都无法突破,得到最后结果。还请老师讲解。谢谢

解答:

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解答: sysadmin

提问:

If 500 is the mutiple of 100 that is closest to x and 400 is the multiple of 100 that is closest to y,which multiple of 100 is closest to x+y? (1)x小于500 (2)y小于400

解答:

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阅读274139
解答: ken@boost.org.cn老师

提问:

老师 32题不懂怎么解,都是看过答案解释还没懂的!

解答:

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阅读274413
解答: ken@boost.org.cn老师

提问:

老师28题解答这里怎么是60的12次方,5的1次方?怎么化简化的?

解答:

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阅读273937
解答: ken@boost.org.cn老师

提问:

老师,这道题做错了,不会,怎么解啊?谢谢!

解答:

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阅读273829
解答: ken@boost.org.cn老师

提问:

May老师这道OG上的题没懂,即使看了下面的解释。谢谢哦!

解答:

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阅读274273
解答: ken@boost.org.cn老师

提问:

求may老师解答

解答:

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阅读274291
解答: 徐小梅老师

提问:

求may老师解答

解答:

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阅读273392
解答: 徐小梅老师

提问:

求may老师解答

解答:

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阅读274354
解答: 徐小梅老师

提问:

求may老师解答

解答:

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阅读274423
解答: 徐小梅老师

提问:

求may老师解答

解答:

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阅读274773
解答: 徐小梅老师

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