1.is the number of members of club x greater than the number of members of club y?1)of the members of club x ,20 percent are also members of club y 2)of the members of club y ,30 percent are also members of club x 为什么选c
2.on an aerial photography ,the surface of a pond appears as circular region of radius 7/16 inch.if a distance of 1 inch on the photography corresponds to an actual distance of 2 miles ,which of the following is the closest estimate of the actual surface area of the pond,in square miles? a 1.3 b 2.4 为什么选b
3.how many integers from 0 to 50,inclusive ,have a remainder of 1 when divided by 3? a.15 b.16 c.17 为什么选c
4.six cards numbered from 1 to 6are placed in an empty bowl.first one card is drawn and then put back into the bowl,then a second card is drawn .if the cards are drawn at random and if the sum of the numbers on the cards is 8,what is proability that one of the two cards drawn is numbered 5 a.1/6 b.1/5 c.1/3 d.2/5 为什么选d
5.what is he ratio of the average height of students in class x to the average height of students in class y? 1)the average height of the students in class x is 120 cm 2)the average height of the students in class x and class y combined is 126cm 为什么选e
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发表于 2011-11-2 20:33:09
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