Civil Service Exam Reviewer · Logical Reasoning · hard
A survey of 153 households in a barangay found that 83 have a water refilling subscription, 74 have internet, and 76 have cable TV. Also, 43 do the first two, 42 do the first and third, 39 do the second and third, and 25 do all three. How many do EXACTLY ONE of the three?
- 109
- 60
- 85
- 63
Answer
B. 60
Solution
Only first = 83 − 43 − 42 + 25 = 23; only second = 17; only third = 20. Exactly one = 60.
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