Question
According to a survey, at least 65% of the people like BlackBerry, 75% like iPhone and 80% like Samsung. It is known that everyone in the survey likes atleast one of these three. What is the minimum percentage of people who like all three?
Answer: Option C
:
C
Let total number of people = X = 100.
No. of people who like BlackBerry = 65
No. of people who like iPhone = 75
No. of people who like Samsung = 80
Now, we need to find IIImin which represents the minimum percentage of people who like all three.
IIImin = 100 - ((X-65) + (X-75) + (X-80))
Therefore, IIImin = 100 - 35 - 25 - 20 = 20.
Thus, required answer = 20%.
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:
C
Let total number of people = X = 100.
No. of people who like BlackBerry = 65
No. of people who like iPhone = 75
No. of people who like Samsung = 80
Now, we need to find IIImin which represents the minimum percentage of people who like all three.
IIImin = 100 - ((X-65) + (X-75) + (X-80))
Therefore, IIImin = 100 - 35 - 25 - 20 = 20.
Thus, required answer = 20%.
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