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Master | Next Rank: 500 Posts
Posts: 265
Joined: Tue Jul 03, 2012 11:04 pmFollowed by: 6 members
by grandh01 » Tue Aug 21, 2012 4:44 pm
Beth received
3/10 of the votes cast in
a certain election. What fraction of the
other votes cast would she have
needed in order to have received
1/2 of the votes cast?
(A)1/5
(B)2/7
(C)3/10
(D)7/20
(E)1/2

OA is B
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Master | Next Rank: 500 Posts
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by theCEO » Tue Aug 21, 2012 5:22 pm
grandh01 wrote:Beth received
3/10 of the votes cast in
a certain election. What fraction of the
other votes cast would she have
needed in order to have received
1/2 of the votes cast?
(A)1/5
(B)2/7
(C)3/10
(D)7/20
(E)1/2

OA is B
Beth received 3/10 votes
She need 5/10 votes to get 1/2 of the votes
therefore she needed 5/10-3/10 = 2/10 votes in addition to her 3/10 votes

Beth did not get (10-3)/10 = 7/10 votes

2/10 is what fraction of 7/10?
(2/10) / (7/10) = 2/7
ans = b
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Master | Next Rank: 500 Posts
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Location: New Jersey
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by truplayer256 » Tue Aug 21, 2012 6:32 pm
Let the number of votes casted be x.

Amount of votes received by Beth = 3x/10
Remaining votes = 7x/10
In order for Beth to receive 1/2 of the votes casted, she needs to receive x/2 votes.

x/2 - 3x/10 = x/5

(x/5)/(7x/10) = 2/7

Choose B.
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by vk_vinayak » Thu Aug 23, 2012 3:03 am
grandh01 wrote:Beth received
3/10 of the votes cast in
a certain election. What fraction of the
other votes cast would she have
needed in order to have received
1/2 of the votes cast?
(A)1/5
(B)2/7
(C)3/10
(D)7/20
(E)1/2

OA is B
Beth received 3 votes from a total of 10 votes. In order to have received 1/2 of the votes cast, she needs 2 more from the other 7 votes. Ans: 2/7
- VK

I will (Learn. Recognize. Apply)
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