allery70 మంది ఉన్న ఒక సమూహంలో 40 మంది పత్రిక P ని, 30 మంది పత్రిక Q ని చదువుతారు మరియు 10 మంది రెండింటినీ చదువుతారు. ఖచ్చితంగా ఒక పత్రికను మాత్రమే చదివేవారు ఎంతమంది?
A55
B50
C40
D45
Answer & Solution
Correct answer: B. 50
ఖచ్చితంగా ఒకటి = (40 - 10) + (30 - 10) = 50.
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