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GMAT Prep Ques (Artist)

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GMAT Prep Ques (Artist)

by dferm » Thu Oct 02, 2008 6:54 pm
Of the paintings that a certain artist created last year, the number of paintings that were unframed was 5 times the number of paintings that were framed. If 48 percent of the unframed paintings and 30 percent of the framed paintings were sold, what percent of the paintings that the artist created last year were sold?

A. 33%
B. 36%
C. 39%
D. 42%
E. 45%

Please Help..
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Re: GMAT Prep Ques (Artist)

by Morgoth » Thu Oct 02, 2008 7:25 pm
dferm wrote:Of the paintings that a certain artist created last year, the number of paintings that were unframed was 5 times the number of paintings that were framed. If 48 percent of the unframed paintings and 30 percent of the framed paintings were sold, what percent of the paintings that the artist created last year were sold?

A. 33%
B. 36%
C. 39%
D. 42%
E. 45%

Please Help..
total paintings = U + F

U = 5F

.48U + .3F = X%(U+F)

.48*5F +.3F = X%(6F)

12/5 F +.3F = X(6F)

(24+3)F/10 = X(6F)

27F/10 = X(6F)

27F/(10*6F) = X

9/20 = X

9/20*100 = X%

9*5 = X% = 45%.

OA?
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by stop@800 » Thu Oct 02, 2008 7:42 pm
Solved with example

A very easy method...........


let total 600


framed 100
unframed 500

48% unframed = 48*5 = 240
30% framed = 30

270/600

= 45%
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by dferm » Thu Oct 02, 2008 7:42 pm
I would have to get back to u on that but i think that is the correct answer... i don't know how you are arriving @ ur answer...
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by Azntycoon » Thu Oct 02, 2008 7:42 pm
What's the answer? I get E, and here's how I got there:

Let "framed" = F
Let "unframed" = U

i) We can infer from the first sentence that U = 5F
ii) From the second sentence, Total sold = 0.48U + 0.3F
iii) The % of Total Sold to Total Paintings is:
(0.48U + 0.3F)/(U + F)
iv) Substitute "5F" into "U", so you get:
(0.48(5F) + 0.3F)/(5F + F)
v) Solve, and you will get 2.7F/6F
vi) Eliminate the F's and solve 2.7/6 = 0.45
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by stop@800 » Thu Oct 02, 2008 7:43 pm
dferm wrote:I would have to get back to u on that but i think that is the correct answer... i don't know how you are arriving @ ur answer...
Doubt at what point??
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by dferm » Thu Oct 02, 2008 7:45 pm
Stop 800 ur correct... thanks for that strategy..........i was trying to solve it algebraically but couldn't figure it out....
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by dferm » Thu Oct 02, 2008 7:47 pm
Thanks guys for ur methods....
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by vishubn » Thu Oct 02, 2008 7:50 pm
My thought as well If this helps u :)

percentage problem ! best approach plug in !!

i randomly chose:

total number of paintings he made =120

Unframed = 5 times the framed

Framed : Unframed = 1:5

which is 20:100

now 48 % of Unframed sold =48 paintings
30% of framed sold=6 paintings

total 54 sold out of 120

(54/120 )*100= 45%

HTH
vishu
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by cramya » Fri Oct 03, 2008 4:30 pm
Vishu same here with choosing 120

Any number and 5 times that shouls work for calculating the total to obtain the actual percent painting sold.
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