Egg ratio problem.

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aj5105: Legendary Member; Posts: 1169; Joined: Sun Jul 06, 2008 2:34 amFollowed by: 1 member; Thanked: 25 times

by aj5105 » Tue Jan 13, 2009 7:48 am

Four jars each contain n eggs. By moving some eggs from the first jar to other jars, the number of the eggs in the jars became 1: 4: 5: 6. How many eggs, in terms of n, were moved out from the first jar?

A. n/3
B. n/2
C. 3n/4
D. 2n/3
E. 5n/6

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Source: Beat The GMAT — Problem Solving | Tue Jan 13, 2009 7:48 am

Mr2Bits: Senior | Next Rank: 100 Posts; Posts: 73; Joined: Wed Jan 07, 2009 1:00 pm; Location: Tampa, FL; Thanked: 9 times; GMAT Score:630

by Mr2Bits » Tue Jan 13, 2009 8:31 am

Im getting C 3N/4

Easiest way is to solve for N as you know the number of jars and total number of eggs.

4n = 1+4+5+6

4N =16

N=4

So each jar started with 4 eggs. 3 eggs were moved out of the jar amongst 4 jars. 3N/4

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logitech: Legendary Member; Posts: 2134; Joined: Mon Oct 20, 2008 11:26 pmFollowed by: 25 members; Thanked: 237 times; GMAT Score:730

Re: Egg ratio problem.

by logitech » Tue Jan 13, 2009 8:50 am

1+4+5+6=16 so,

16/4 =4 can be our n in this question

since we only have 1 egg left in the first one 3 eggs are gone only C gives us 3 when n = 4

LGTCH
---------------------
"DON'T LET ANYONE STEAL YOUR DREAM!"

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pandeyvineet24: Legendary Member; Posts: 527; Joined: Mon Jun 02, 2008 9:14 am; Location: Atlanta; Thanked: 17 times

by pandeyvineet24 » Tue Jan 13, 2009 11:23 am

let x be the number of eggs removed from 1st Jar.

therefore

(n-x)/(n+x) = 1/(4+5+6)

solve for x
x= 3N/4

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