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John , bart, and lio have x, y, z number of marbles respectively. If x

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John , bart, and lio have x, y, z number of marbles respectively. If x [#permalink]

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New post 30 Apr 2018, 17:39
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John , bart, and lio have x, y, z number of marbles respectively. If x=6y=3z, what fraction of his marbles should john give to bart and lio so that all of them have equal number of marbles ?

A) 5
B)1/4
C)1/3
D)1/2
E) 6
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Re: John , bart, and lio have x, y, z number of marbles respectively. If x [#permalink]

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New post 30 Apr 2018, 17:54
selim wrote:
John , bart, and lio have x, y, z number of marbles respectively. If x=6y=3z, what fraction of his marbles should john give to bart and lio so that all of them have equal number of marbles ?

A) 5
B)1/4
C)1/3
D)1/2
E) 6


The fastest way is to substitute variables with real numbers. Let them have (x=6y=3z) 6, 1, 2 marbles. So John should give away 3 pcs to make 3=3=3 for each guy. 3/6=1/2. Answer (D)
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Re: John , bart, and lio have x, y, z number of marbles respectively. If x   [#permalink] 30 Apr 2018, 17:54
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John , bart, and lio have x, y, z number of marbles respectively. If x

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