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29 Oct 2017, 01:14
Kudos
Bookmarks
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
92% (01:10) correct
8%
(01:07)
wrong
based on 191
sessions
History
Date
Time
Result
Not Attempted Yet
In a survey of the town of Waso, it was found that 65% of the people surveyed watched the news on television, 40% read a newspaper, and 25% read a newspaper and watched the news on television. What percent of the people surveyed neither watched the news on television nor read a newspaper?
(A) 0%
(B) 5%
(C) 10%
(D) 15%
(E) 20%
(A) 0%
(B) 5%
(C) 10%
(D) 15%
(E) 20%
29 Oct 2017, 09:34
Kudos
Bookmarks
I have approached this problem by matrix method.
Here lets consider :
NP: Person reading News Paper
NNP: Person not reading News Paper
T: Person watched the news on Television
NT: Person did not watched the news on television
The answer to the question is option E.
Here lets consider :
NP: Person reading News Paper
NNP: Person not reading News Paper
T: Person watched the news on Television
NT: Person did not watched the news on television
The answer to the question is option E.
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31 Oct 2017, 17:11
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Bookmarks
Bunuel
When dealing with overlapping sets, the most efficient way to solve for any of the values is to use the Group equation whereby Total = Group 1 + Group 2 - Both + Neither. In this case, since percents are used, substitute 100 for the total and use the provided percentages for the groups to solve. Therefore, 100 = 65 + 40 - 25 + Neither. Solving the equation yields Neither = 20% or choice E.
