P = {a,b}, Q = {b,c}, R = {3,4} হলে, (P∩Q)∪R -এর উপাদান সংখ্যা কত?

A 2

B 4

C 3

D 5

Solution

Correct Answer: Option C

(P∩Q) = {a,b} ∩ {b,c} = {b} 
∴ (P∩Q)∪R =  {b} ∪ {3,4} = {b,3,4} 
∴ (P∩Q)∪R এর উপাদান সংখ্যা = 3

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