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15 Jul 2018, 08:32
Kudos
Bookmarks
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
79% (01:33) correct
21%
(01:52)
wrong
based on 389
sessions
History
Date
Time
Result
Not Attempted Yet
In a recent survey, 80% of the people polled were registered voters and 75% of the registered voters voted in the last election. What fraction of all those surveyed were registered voters that did not vote in the last election?
A) \(\frac{1}{10}\)
B) \(\frac{1}{5}\)
C) \(\frac{1}{4}\)
D) \(\frac{3}{10}\)
E) \(\frac{1}{3}\)
A) \(\frac{1}{10}\)
B) \(\frac{1}{5}\)
C) \(\frac{1}{4}\)
D) \(\frac{3}{10}\)
E) \(\frac{1}{3}\)
15 Jul 2018, 09:18
Kudos
Bookmarks
+1 for B.
Suppose, there are 100 people.
Registered voters = 80% of 100 = 80
Number of people voted = 75% of 80 = 60
Number of registered people who did not vote = 80 - 60 = 20
Therefore,
= 20/100
= 1/5
Hence, B.
Suppose, there are 100 people.
Registered voters = 80% of 100 = 80
Number of people voted = 75% of 80 = 60
Number of registered people who did not vote = 80 - 60 = 20
Therefore,
= 20/100
= 1/5
Hence, B.
15 Jul 2018, 10:29
Kudos
Bookmarks
Bunuel
In percentage question it's better to deal with some smart numbers.
Let the no of people be 100
No. of registered voters = 100*80% = 80
No of registered voters voted in the last election = 80*75% = 60
No of registered voters didn't vote in the last election = 80-60 = 20
Required Fraction = Voters didn't vote / all those surveyed
= 20 / 100
= 1/5
The best answer is B.
