alleryयदि समुच्चय A में 18 सदस्य हैं, समुच्चय B में 12 सदस्य हैं तथा A और B में 5 उभयनिष्ठ सदस्य हैं, तो उनके सम्मिलन (union) में कितने सदस्य हैं?
A20
B25
C35
D30
Answer & Solution
Correct answer: B. 25
सम्मिलन (Union) = 18 + 12 - 5 = 25, क्योंकि उभयनिष्ठ सदस्यों की गणना केवल एक ही बार की जाती है।
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