alleryએક સોસાયટીમાં, 70 હિન્દી બોલે છે, 50 અંગ્રેજી બોલે છે અને 30 બંને બોલે છે. આ બેમાંથી ઓછામાં ઓછી એક ભાષા બોલતા હોય તેવા કેટલા લોકો છે?
A60
B70
C80
D90
Answer & Solution
Correct answer: D. 90
ઓછામાં ઓછી એક = n(H ∪ E) = 70 + 50 - 30 = 90.
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