alleryवसाहतींत 70 हिंदी, 50 इंग्लीश आनी 30 दोनूय उलयतात. ह्या दोन भासांतली एक भास तरी कितले उलयतात?
A60
B70
C80
D90
Answer & Solution
Correct answer: D. 90
उण्यांत उणें एक = n(H ∪ E) = 70 + 50 - 30 = 90.
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