alleryदो समुच्चयों (सेट्स) के सम्मिलन (यूनियन) में 30 सदस्य हैं। एक समुच्चय में 20 और दूसरे में 18 सदस्य हैं। दोनों में उभयनिष्ठ (साझा) सदस्यों की संख्या कितनी है?
A12
B10
C8
D6
Answer & Solution
Correct answer: C. 8
उभयनिष्ठ (साझा) = 20 + 18 - 30 = दो बार गिने गए 8 सदस्य।
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