请教2个问题

johnson1412 · 发表于 2012-3-9 00:12:13

If the average (arithmetic mean) of the assessed values
of x houses is$212,000 and the average of the assessed
values of yother houses is $194,000, what is the average
of the assessedvalues of the x+y houses?

(1) x+y=36
(2) x=2y
答案是C
我觉得知道比例就够了，选B

johnson1412 · 发表于 2012-3-9 00:14:03

The sides of a square region, measured to the
nearest centimeter, are 6 centimeterslong. The
least possible value of the actualarea of the
square region is
A.36.00 sq cm
B.35.00 sq cm
C.33.75 sq cm
D.30.25 sq cm
E.25.00 sq cm
答案是C
GMAT的measured to nearest centimeter, 不是四舍五入？我选的D

johnson1412 · 发表于 2012-3-9 00:29:21

我思路有问题？还是答案错了？

深圳的游子 · 发表于 2012-3-9 00:31:10

If the average (arithmetic mean) of the assessed values
of x houses is$212,000 and the average of the assessed
values of yother houses is $194,000, what is the average
of the assessedvalues of the x+y houses?

(1) x+y=36
(2) x=2y
答案是C
我觉得知道比例就够了，选B

-- by 会员 johnson1412 (2012/3/9 0:12:13)

You're right

深圳的游子 · 发表于 2012-3-9 00:33:58

The sides of a square region, measured to the
nearest centimeter, are 6 centimeterslong. The
least possible value of the actualarea of the
square region is
A.36.00 sq cm
B.35.00 sq cm
C.33.75 sq cm
D.30.25 sq cm
E.25.00 sq cm
答案是C
GMAT的measured to nearest centimeter, 不是四舍五入？我选的D

-- by 会员 johnson1412 (2012/3/9 0:14:03)

是你对的

请教2个问题

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