প্রদত্ত ভেনচিত্রে U = A ∪ B ∪ C এবং n(U) = 50 হলে, x এর মান কত?
Solution
Correct Answer: Option B
U = A ∪ B ∪ C এবং n(U) = 50
এখন
2x + 2 + 3 + x + 1 + x - 1 + 0 + x + 5 = 50
5x + 10 = 50
5x = 50 - 10
5x = 40
x = 8
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