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If `n(A nn B) = 40, n(A) = 50` and `n(B) = 60`, then find `n(A DeltaB)` |
Answer» `n(A uu B) = n(A) + n(B) - n(A uu B) = 50 + 60 - 40 = 70` `n(A Delta B) = n(A uu B) - n(A nn B)` `rArr 70 - 40 = 30`. |
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