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If X and Y are two sets such that X has 40 elements, `X uu Y` has 60 elements and `X nn Y` has 10 elements, how many elements does Y have?

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MODERN PUBLICATION-SETS-EXERCISE
  1. If A and B are two sets such that A uu B has 20 elements, A has 8 elem...

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  2. If S and T are two sets such that S has 21 elements, T has 32 elements...

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  3. If X and Y are two sets such that X has 40 elements, X uu Y has 60 ele...

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  4. If A and B are two sets such that : n(A)=20, n (A uu B)=42 and n (A n...

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  5. If A and B are two sets such that : n(A)=17, n (A uu B)=38 and n (A n...

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  6. Let n(U)= 700, n(A)= 200, n(B) = 300 and n(Ann B)= 100, then n (A^c nn...

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  14. In a group of students, 100 students know Hindi, 50 know English and 2...

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