প্রদত্ত ভেনচিত্রে U = A ∪ B ∪ C এবং n(U) = 50 হলে, x এর মান কত?

 


A 6  

B

C 10 

D 12 

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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