Civil Service Exam Reviewer · Logical Reasoning · hard
A survey of 117 employees of a provincial office found that 67 speak Ilocano, 63 speak Cebuano, and 65 speak Hiligaynon. Also, 35 do the first two, 39 do the first and third, 43 do the second and third, and 23 do all three. How many do NONE of the three?
- 39
- 19
- 13
- 16
Answer
D. 16
Solution
At least one = 67 + 63 + 65 − 35 − 39 − 43 + 23 = 101. None = 117 − 101 = 16.
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