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28 Feb 2016, 09:53
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Is the ratio of women to men as members of a certain yoga studio greater than 5?
(1) Women make up 67/81 of the studio's members.
(2) The studio has exactly 42 men who are members.
(1) Women make up 67/81 of the studio's members.
(2) The studio has exactly 42 men who are members.
29 Feb 2016, 01:22
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Bunuel
Is the ratio of women to men as members of a certain yoga studio greater than 5?
(1) Women make up 67/81 of the studio's members.
(2) The studio has exactly 42 men who are members.
(1) Women make up 67/81 of the studio's members.
(2) The studio has exactly 42 men who are members.
A) gives us the ratio of women to the total number of members in the studio.
we do not know the exact number of members in the studio. ; hence INSUFFICIENT
B) GIves us no information about the number of women of the total members in the studio
hence ; INSUFFICIENT
TOGETHER A & B are sufficient.
67x / 81x = ratio of women / total memebers
Kudos if i helped
14x = No. of men = 42
x = 3
67 x 3 = 201 = No. of Women
Ratio of women to men = 201/42
29 Feb 2016, 21:09
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Forget conventional ways of solving math questions. In DS, Variable approach is the easiest and quickest way to find the answer without actually solving the problem. Remember equal number of variables and independent equations ensures a solution.
Is the ratio of women to men as members of a certain yoga studio greater than 5?
(1) Women make up 67/81 of the studio's members.
(2) The studio has exactly 42 men who are members.
In general, one con is number and the other con is ratio, it is mostly likely that ratio is the answer according to the method of approach to variable.
For 1), w/(w+m)=67/81 -> w:m=67:(81-67)=67:14=67/14<5, which is always no and sufficient.
Thus, A is the answer.
from con 1) and con 2), if one of the conditions is given by numbers and the other is given by ratio (percent,fraction), then the condition with ratio (percent,fraction) value has higher chance of being the answer.
Is the ratio of women to men as members of a certain yoga studio greater than 5?
(1) Women make up 67/81 of the studio's members.
(2) The studio has exactly 42 men who are members.
In general, one con is number and the other con is ratio, it is mostly likely that ratio is the answer according to the method of approach to variable.
For 1), w/(w+m)=67/81 -> w:m=67:(81-67)=67:14=67/14<5, which is always no and sufficient.
Thus, A is the answer.
from con 1) and con 2), if one of the conditions is given by numbers and the other is given by ratio (percent,fraction), then the condition with ratio (percent,fraction) value has higher chance of being the answer.
