alleryA మరియు B ల సమ్మేళనంలో 90 మంది సభ్యులు ఉన్నారు, A∩B లో 20 మంది మరియు A లో 60 మంది ఉన్నారు. B లో ఎంతమంది సభ్యులు ఉన్నారు?
A50
B70
C30
D40
Answer & Solution
Correct answer: A. 50
90 = 60 + B - 20 నుండి, B = 50.
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