allery45 మంది విద్యార్థులున్న తరగతిలో, 25 మంది చరిత్ర, 20 మంది భూగోళశాస్త్రం చదువుతున్నారు మరియు 5 మంది రెండింటిలో దేనినీ చదవరు. రెండింటినీ చదివేవారు ఎంతమంది?
A15
B10
C5
D0
Answer & Solution
Correct answer: C. 5
సమ్మేళనం = 45 - 5 = 40. రెండూ = 25 + 20 - 40 = 5.
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