alleryসেট A-তে 30 জন সদস্য, সেট B-তে 25 জন এবং সমগ্র দলে 40 জন রয়েছেন। সম্ভাব্য সর্বনিম্ন সাধারণ অংশ কত?
A0
B10
C5
D15
Answer & Solution
Correct answer: D. 15
সংযোগটি 40-এর বেশি হতে পারে না, তাই সাধারণ অংশটি অন্তত 30 + 25 - 40 = 15।
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