Yahoo Answers: Answers and Comments for Mock paper MC [數學]
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From Alex
zhHantHK
Sat, 03 Jan 2015 15:11:40 +0000
3
Yahoo Answers: Answers and Comments for Mock paper MC [數學]
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https://hk.answers.yahoo.com/question/index?qid=20150103000051KK00059
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From 邊位都好: 1. For vehicles :Number of ways to select 2 ...
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https://hk.answers.yahoo.com/question/index?qid=20150103000051KK00059
Sat, 10 Jan 2015 13:35:17 +0000
1. For vehicles :Number of ways to select 2 lorries out of the 4 = 4C2Number of ways to select 1 van out of the 4 = 4C1For drivers, there are 2 possibles ways : (a) choose 1 van driver and 2 others (b) choose 3 othersNumber of ways for (a) = 3P1 * 7P2Number of ways for (b) = 7P3Therefore, number of ways of assigning for the order is :4C2 * 4C1 * (7P2 * 3P1 + 7P3) ⋯⋯⋯⋯ (D)
2. Question not clear.
3. From graph, a > 1 > b > 0 > cSo the answer is D.
4. 2log2c  log2c = log2c, and, 4log2c  2log2c = 2log2cTheir difference is not the same, it is not an A.S.In the other way, 2log2c / log2c = 2, and, 4log2c / 2log2c = 2They have the same ratio, so, it is a G.S.
5. Wrong question, as eat in A is 1/2, eat in B is 3/5.1/2 + 3/5 = 11/10 > 1, impossible.
6. If the area is the greatest, then OC⊥AB, that is, the coordinates of C is (8, 6) ⋯⋯⋯⋯ (D)
7. Number of students in May, June, July, August are 200, 300, 400, 350 respectively.I. 400/300 = 4/3 ≠ 3 ... FalseII. Increase in July is (400300)=100, in June is (300200)=100. same ... FalseIII. Increase % = (350200)/200 * 100% = 75% ... TrueSo the answer is (A)

From Alex: typo ... sorry I got it
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https://hk.answers.yahoo.com/question/index?qid=20150103000051KK00059
Wed, 07 Jan 2015 17:13:09 +0000
typo ... sorry I got it

From YA HOO！知識＋管理員: q4 似係 gs 多過 as .
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https://hk.answers.yahoo.com/question/index?qid=20150103000051KK00059
Wed, 07 Jan 2015 14:28:49 +0000
q4 似係 gs 多過 as .