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mix and alligation

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Manager
Manager
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Joined: 09 May 2009
Posts: 204
Followers: 1

Kudos [?]: 89 [0], given: 13

mix and alligation [#permalink] New post 16 Dec 2009, 02:18
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Difficulty:

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Question Stats:

80% (01:50) correct 20% (00:00) wrong based on 8 sessions
A breakfast that consists of 1 ounce of corn puffs and 8 ounces of fruit X provides 257 calories. When 8 ounces of fruit Y is substituted for the 8 ounces of fruit X, the total number of calories is reduced to 185. If fruit X provides 1.8 times as many calories as fruit Y, how many calories does 8 ounces of fruit Y alone provide ?
(A) 11.25
(B) 72
(C) 90
(D) 95
(E) 129.6
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1 KUDOS received
Senior Manager
Senior Manager
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Joined: 30 Aug 2009
Posts: 290
Location: India
Concentration: General Management
Followers: 3

Kudos [?]: 95 [1] , given: 5

Re: mix and alligation [#permalink] New post 16 Dec 2009, 03:18
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xcusemeplz2009 wrote:
A breakfast that consists of 1 ounce of corn puffs and 8 ounces of fruit X provides 257 calories. When 8 ounces of fruit Y is substituted for the 8 ounces of fruit X, the total number of calories is reduced to 185. If fruit X provides 1.8 times as many calories as fruit Y, how many calories does 8 ounces of fruit Y alone provide ?
(A) 11.25
(B) 72
(C) 90
(D) 95
(E) 129.6


1C + 8X = 257 ----1
1C + 8Y = 185 ----2
subtracting 2 from 1 we get
8X - 8Y = 72 or X - Y = 9. now X = 1.8 Y

so 1.8Y - Y = 9 or 0.8Y = 9 or 8Y = 90....C
Manager
Manager
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Joined: 09 May 2009
Posts: 204
Followers: 1

Kudos [?]: 89 [0], given: 13

Re: mix and alligation [#permalink] New post 16 Dec 2009, 03:19
kp1811 wrote:
xcusemeplz2009 wrote:
A breakfast that consists of 1 ounce of corn puffs and 8 ounces of fruit X provides 257 calories. When 8 ounces of fruit Y is substituted for the 8 ounces of fruit X, the total number of calories is reduced to 185. If fruit X provides 1.8 times as many calories as fruit Y, how many calories does 8 ounces of fruit Y alone provide ?
(A) 11.25
(B) 72
(C) 90
(D) 95
(E) 129.6


1C + 8X = 257 ----1
1C + 8Y = 185 ----2
subtracting 2 from 1 we get
8X - 8Y = 72 or X - Y = 9. now X = 1.8 Y

so 1.8Y - Y = 9 or 0.8Y = 9 or 8Y = 90....C


grt! thanks c is the ans
_________________

GMAT is not a game for losers , and the moment u decide to appear for it u are no more a loser........ITS A BRAIN GAME

Re: mix and alligation   [#permalink] 16 Dec 2009, 03:19
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