A and B started a business with investments in the ratio 3:5 respectively. Find the share of A, if they earned a profit of Rs. 2000.
Share of A = (3/8)×2000 = Rs. 750
If n(A) = 25, n(B) = 40 and n(A ∪ B) = 50, then n(A ∩ B) equals
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