alleryరెండు సమితుల సమ్మేళనం (union) లో 30 మూలకాలు ఉన్నాయి. ఒక సమితిలో 20 మరియు మరొకదానిలో 18 ఉన్నాయి. ఆ రెండు సమితులలో ఉమ్మడిగా ఉన్నవి ఎన్ని?
A12
B10
C8
D6
Answer & Solution
Correct answer: C. 8
ఉమ్మడి భాగం (Overlap) = 20 + 18 - 30 = 8 మంది సభ్యులు రెండుసార్లు లెక్కించబడ్డారు.
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