In a survey, 30% of the people surveyed owned a personal computer and 75% owned a cellular telephone. If 25% owned both a cellular telephone and a personal computer, then the percentage of the people who does not have either of the instrument?
Solution
Correct Answer: Option D
Only Cellular telephone (75-25)% = 50%
only pc (30-25)% = 5%
So, either cellular or pc and both = (50+5+25)% = 80%
the percentage of the people who does not have either of the instrument = (100-80)% = 20%
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