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03 Jul 2017, 03:32
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
74% (02:15) correct
26%
(02:28)
wrong
based on 1241
sessions
History
Date
Time
Result
Not Attempted Yet
According to a survey, 7 percent of teenagers have not used a computer to play games, 11 percent have not used a computer to write reports, and 95 percent have used a computer for at least one of the above purposes. What percent of the teenagers in the survey have used a computer both to play games and to write reports?
(A) 13%
(B) 56%
(C) 77%
(D) 87%
(E) 91%
(A) 13%
(B) 56%
(C) 77%
(D) 87%
(E) 91%
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03 Jul 2017, 03:43
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Given: 7 percent of teenagers have not used a computer to play games.
The percentage of teenagers who have used a computer to play games is 93%
Since 11 percent have not used a computer to write reports, the percentage of
teenagers who have used a computer to write reports is 89%
It has been given that teenagers who have used the computer for at least one of
the purposes - 95% (making the number of teenagers not using computers - 5%)
P(Total) = P(Play games) + P(Write Reports) - P(Both) + P(Neither)
Substituting values, we will get 100 = 93 + 89 - x + 5 | x = 182 + 5 - 100 = 87
Therefore, the percentage of teenagers who use the computer for both purposes is 87%(Option D)
The percentage of teenagers who have used a computer to play games is 93%
Since 11 percent have not used a computer to write reports, the percentage of
teenagers who have used a computer to write reports is 89%
It has been given that teenagers who have used the computer for at least one of
the purposes - 95% (making the number of teenagers not using computers - 5%)
P(Total) = P(Play games) + P(Write Reports) - P(Both) + P(Neither)
Substituting values, we will get 100 = 93 + 89 - x + 5 | x = 182 + 5 - 100 = 87
Therefore, the percentage of teenagers who use the computer for both purposes is 87%(Option D)
03 Oct 2018, 20:26
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Bunuel
Please solution using grid as mentioned below:
Answer: Option D
funsogu Please check answer to your question (asked in PM) here. a+b+c = 95 which gives us d = 100-95=5
I hope this helps!!!
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