Thanks for the detailed explanation. In your response, 'Unfavorable for at least one = 20 + 35 - 10 = 45'. Shouldn't it be "exactly one" instead of "atleast one"
TheNona wrote:
Thanks Karishma for the great explanation . In fact what I was struggling with is the insufficiency of B . Cannot understand why ?
Let's consider statement 2:
(2) The number of voters who responded “unfavorable” for both candidates was 10.
So this means that 90 people replied "favorable" or "not sure" to at least one of the candidates.
Also, going back to the table in the question,
Unfavorable for candidate M = 20
Unfavorable for candidate N = 35
Unfavorable for both = 10
Unfavorable for at least one = 20 + 35 - 10 = 45
So, all we know from here is the following:
1. 10 people responded "unfavorable" to both candidates
2. 35 (= 45 - 10) people responded "unfavorable to one candidate and "favorable" or "not sure" to the other.
3. 55 people responded with "favorable" or "not sure" to both the candidates.
Now we don't know the split between "favorable" and "not sure".
It is possible that 10 people responded "favorable" to both and it is also possible that that number is 15.