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Ana is a girl and has the same number of brothers as sisters
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Updated on: 19 Apr 2016, 23:23
Updated on: 19 Apr 2016, 23:23
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75% (02:20) correct
25% (02:40) wrong based on 8 sessions
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Ana is a girl and has the same number of brothers as sisters. Andrew is a boy and has twice as many sisters as brothers. Ana and Andrew are the children of Emma. How many children does Emma have?
(A) 2
(B) 3
(C) 5
(D) 7
(E) 8
Official answer will be provided after some discussion.
Kudos for a detailed solution.
Another Kudos for every alternative solution.
(A) 2
(B) 3
(C) 5
(D) 7
(E) 8
Official answer will be provided after some discussion.
Kudos for a detailed solution.
Another Kudos for every alternative solution.
Re: Ana is a girl and has the same number of brothers as sisters
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15 Apr 2016, 18:05
15 Apr 2016, 18:05
Ans is 3.
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Posted from my mobile device
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Joined: 16 May 2014
Posts: 592
Given Kudos: 0
GRE 1: Q165 V161
Re: Ana is a girl and has the same number of brothers as sisters
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17 Apr 2016, 00:01
17 Apr 2016, 00:01
1
Expert Reply
Explanation:
Lets assume that Ana has x brothers and x sisters. Therefore the total number of children become 2x+1 (including Ana).
Now lets check Andrew, who has exactly the twice number of sisters as brothers. Now there are x boys and x+1 girls. So Andrew has (x-1) brothers and (x+1) sisters. According to the given information:
(x+1) = 2 (x-1)
or, x +1 = 2x -2
or, x = 3.
Therefore the total number of children are (2x+1) or 7.
