alleryएका वसाहतीत, 70 जण हिंदी बोलतात, 50 जण इंग्रजी बोलतात आणि 30 जण दोन्ही भाषा बोलतात. या दोन भाषांपैकी किमान एक भाषा बोलणारे किती लोक आहेत?
A60
B70
C80
D90
Answer & Solution
Correct answer: D. 90
किमान एक = n(H ∪ E) = 70 + 50 - 30 = 90.
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