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Help with three questions!!

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Intern
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Help with three questions!! [#permalink]

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New post 07 Sep 2008, 19:23
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Guys,

I got stuck with these three problems. Kindly see the hyperlink to reach to those problems.

http://www.gyangang.com/gyan-bank/gmat/ ... view/#2392

Help me with Q1, Q3 and Q5..

Thanks!!!

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Re: Help with three questions!! [#permalink]

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New post 07 Sep 2008, 20:22
Q1 a retailer sells 5 shirts. The first 2 he sells for $64 and $39. If the retailer wishes to sell the 5 shirts for an overall average price of over $50, what must be the minimum average price of the remaining 3 shirts?

A. $49.00
B. $49.67
C. $50.00
D. $51.33
E. $55.50

IMO A
For this problem, i looked at it as $50.01.

(64+39 +3x)/5 = 50.01
103 + 3x = 250.05
3x = 147.05
147.05/3 = 49.00


Q3 When the stock market opened yesterday, the price of a share of stock X was 10 1/2. When the market closed, the price was 11 1/8, of the following, which is closest to the percent, increase in the price of stock X?
A. 5.9%
B. 5.99%
C. 5.89%
D. 5. 95%
E. 5.92%

Answer: D

convert the prices to fractions
10 1/2 = 21/2 = 84/8
11 1/8 = 89/8
89/8 - 84/8 = 5/8
(5/8)/84/8 = 5/84 = 5.95%


Q5. If |d-9| = 2d, then d=
A. -9
B. -3
C. 1
D. 3
E. 9
Answer: D

your taking the absolute value of d-9 so 3-9 =-6 but then is 6

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Re: Help with three questions!! [#permalink]

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New post 07 Sep 2008, 21:51
Q1: B

(64+39+3x) / 5 = (<50)
103+3x = (<50)*5 = (<250)
3x = (<250) - 103
3x = (<147)
x = (<147) / 3 = (<49)

The smallest number above 49 will then satisfy the question. (when dealing with a number smaller than or greater than, I wouldn't recommend plugging in a number slightly smaller/greater, since this can lead you to the wrong answer)

On Q3, Q5 I agree on D, D respectively.

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Re: Help with three questions!! [#permalink]

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New post 08 Sep 2008, 00:10
Guys

did anyone confirm the official answers?

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Re: Help with three questions!! [#permalink]

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New post 08 Sep 2008, 11:03
Q1: A (or B)
(64+39+3p)/5 > 50
103+3p > 250
3p > 147
p > 49

Looks like the wording of the question is screwed up. Answer is either A or B. I would go with A, since B is not really a minimum.

Q3: D
11.125 - 10.5 = 89/8 - 84/8 = 5/8
(5/8)/(84/8) = 5/84 ~ 5.95%

Q5: D
|d-9| = 2d
d must be positive

If d < 9,
9-d = 2d
d = 3

Or

d > 9
d - 9 = 2d
d = -3 <--- this is undefined

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Re: Help with three questions!! [#permalink]

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New post 08 Sep 2008, 11:13
orkut12 wrote:
Guys

did anyone confirm the official answers?


do u not have the answers?

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Re: Help with three questions!! [#permalink]

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New post 08 Sep 2008, 11:33
I agree zoinnk, I think the question on Q1 should say: which of the following...

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Re: Help with three questions!!   [#permalink] 08 Sep 2008, 11:33
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Help with three questions!!

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