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Mani, Sani and Karna have x, y and z number of chocolates respectively

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Mani, Sani and Karna have x, y and z number of chocolates respectively  [#permalink]

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New post 28 Jun 2018, 11:04
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66% (02:00) correct 34% (01:36) wrong based on 46 sessions

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Mani, Sani and Karna have x, y and z number of chocolates respectively. Does Sani have the average of the total number of chocolates among all three?

(1) y is 20% more than z and 25% less than x.

(2) x = 32.
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Re: Mani, Sani and Karna have x, y and z number of chocolates respectively  [#permalink]

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New post 28 Jun 2018, 19:27
Mani, Sani and Karna have x, y and z number of chocolates respectively. Does Sani have the average of the total number of chocolates among all three?

Is x+z=2y??

(1) y is 20% more than z and 25% less than x.
Since it gives us a ratio between 3, should be sufficient..
Let z=100, y=120% of 100=120
Also y=75% of X.....120=75% of X
X=120*4/3=160
So 100,120,160
Y is not the average
Sufficient

(2) x = 32.
Nothing about others
Insufficient

A
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1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html


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Re: Mani, Sani and Karna have x, y and z number of chocolates respectively &nbs [#permalink] 28 Jun 2018, 19:27
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