Question
Five persons N, P, R, U and Y have different weights.
Only one person has more weight than Y. P is heavier than U but not the heaviest. Weight of second lightest person is 68kgs. N is heavier than R, who is heavier than U. R's weight is more than 68kgs. Who is the third heaviest person?Solution
Only one person has more weight than Y. Weight of second lightest person is 68kgs. __ > Y > __ > (68Kg) > __ P is heavier than U but not the heaviest. N is heavier than R, who is heavier than U. R's weight is more than 68kgs. N > Y > R > P (68Kg) > U
If n(A) = 25, n(B) = 40 and n(A ∪ B) = 50, then n(A ∩ B) equals
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