allery70 మంది వ్యక్తుల సమూహంలో, 40 మంది టీ, 35 మంది కాఫీ మరియు 15 మంది రెండింటిలో దేనినీ తాగరు. రెండింటినీ తాగేవారు ఎంతమంది?
A10
B15
C20
D25
Answer & Solution
Correct answer: C. 20
సమ్మేళనం = 70 - 15 = 55. రెండింటినీ తాగేవారు = 40 + 35 - 55 = 20.
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