यदि (n\(A\cup B\cup C\)=128), ठीक एक समुच्चय में (63) और तीनों में (11) तत्व हैं, तो ठीक दो समुच्चयों में कितने तत्व हैं?
If (n\(A\cup B\cup C\)=128), (63) elements are in exactly one set, and (11) are in all three sets, how many elements are in exactly two sets?
Explanation opens after your attempt
B. (54)
Concept
Exactly two is (128-63-11=54). Solve by dividing the union into three classes.
Why this answer is correct
The correct answer is B. (54). Exactly two is (128-63-11=54). Solve by dividing the union into three classes.
Exam Tip
ठीक दो (128-63-11=54) हैं। संघ को तीन वर्गों में बांटकर हल करें।
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