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How many pounds of salt at 50 cents/lb must be mixed [#permalink]
07 Aug 2012, 12:26
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Question Stats:
71% (02:44) correct
29% (03:05) wrong based on 138 sessions
How many pounds of salt at 50 cents/lb must be mixed with 40 lbs of salt that costs 35 cents/lb so that a merchant will get 20% profit by selling the mixture at 48 cents/lb?
Re: How many pounds of salt at 50 cents/lb must be mixed [#permalink]
07 Aug 2012, 20:59
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SOURH7WK wrote:
How many pounds of salt at 50 cents/lb must be mixed with 40 lbs of salt that costs 35 cents/lb so that a merchant will get 20% profit by selling the mixture at 48 cents/lb?
A) 20 B) 15 C) 40 D) 50 E) 25
Source: 4gmat
Selling price is 48 cents/lb For a 20% profit, cost price should be 40 cents/lb (CP*6/5 = 48)
Basically, you need to mix 35 cents/lb (Salt 1) with 50 cents/lb (Salt 2) to get a mixture costing 40 cents/lb (Salt Avg)
weight of Salt1/weight of Salt2 = (Salt2 - SaltAvg)/(SaltAvg - Salt1) = (50 - 40)/(40 - 35) = 2/1 We know that weight of salt 1 is 40 lbs. Weight of salt 2 must be 20 lbs.
Re: How many pounds of salt at 50 cents/lb must be mixed [#permalink]
18 Apr 2014, 23:13
Alligation Says
50----------------------------------35
---------------40-------------------
5------------------------------------10
Why 40 is because 1.2*40 = 48 at which it was sold.
50C:35C should be used in ratio 1:2
WKT, 35c used is 40 lbs then
50C used is 20 _________________
Rgds, TGC! _____________________________________________________________________ I Assisted You => KUDOS Please _____________________________________________________________________________
Re: How many pounds of salt at 50 cents/lb must be mixed [#permalink]
04 Aug 2015, 19:27
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