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One adult and 10 children are on an elevator. If the adult's
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26 Dec 2020, 03:51
26 Dec 2020, 03:51
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Question Stats:
75% (01:18) correct
25% (02:34) wrong based on 8 sessions
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One adult and 10 children are on an elevator. If the adult's weight is 4 times the average (arithmetic mean) weight of the children, the adult's weight is what fraction of the total weight of the 11 people on the elevator?
A. 1/11
B. 1/4
C. 2/7
D. 4/11
E. 2/5
Kudos for the right answer and explanation
A. 1/11
B. 1/4
C. 2/7
D. 4/11
E. 2/5
Kudos for the right answer and explanation
Re: One adult and 10 children are on an elevator. If the adult's
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26 Dec 2020, 08:10
26 Dec 2020, 08:10
1
Let's take the avg weight of 10 children = x
Now the weight of the adult is = 4x
We are asked for the ration of the weight of the adult to the total weight.
Total weight will be 4x + 10x = 14x ( 10x as the avg weight is x so for 10 boys it will be 10 times of avg)
Ratio = 4x/14x
= 2/7
Answer C
Now the weight of the adult is = 4x
We are asked for the ration of the weight of the adult to the total weight.
Total weight will be 4x + 10x = 14x ( 10x as the avg weight is x so for 10 boys it will be 10 times of avg)
Ratio = 4x/14x
= 2/7
Answer C
gmatclubot
Re: One adult and 10 children are on an elevator. If the adult's [#permalink]
26 Dec 2020, 08:10
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