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17 Dec 2018, 08:48
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A
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Difficulty:
5%
(low)
Question Stats:
91% (01:27) correct
9%
(01:41)
wrong
based on 1155
sessions
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Of a group of people surveyed in a political poll, 60 percent said that they would vote for candidate R. Of those who said they would vote for R, 90 percent actually voted for R, and of those who did not say that they would vote for R, 5 percent actually voted for R. What percent of the group voted for R?
(A) 56%
(B) 59%
(C) 62%
(D) 65%
(E) 74%
(A) 56%
(B) 59%
(C) 62%
(D) 65%
(E) 74%
Archit3110
Major Poster
17 Dec 2018, 09:00
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I solved using 2x2 matrix
Solution attached
IMO A 56%
Solution attached
IMO A 56%
HKD1710
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File comment: 2x2 matrix
VOTE.xlsx [30.3 KiB]
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17 Dec 2018, 09:23
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Group = 100 people
60% said they would vote R = 60 people
Of the 60 people only 90% actually voted R = 54
40% said they would NOT vote R = 40 people
Of the 40 people who would vote NOT R, 5% voted R instead = 2
So 54+2= 56
A
60% said they would vote R = 60 people
Of the 60 people only 90% actually voted R = 54
40% said they would NOT vote R = 40 people
Of the 40 people who would vote NOT R, 5% voted R instead = 2
So 54+2= 56
A
