Web16 Mar 2024 · The answer is 4!/ ( (4-2)!*2!) = 6. The six combinations are AB, AC, AD, BC, BD, and CD. Note: In the same example, we have different cases for permutation and combination. For permutation, AB and BA are two different things but for selection, AB and BA are the same. WebQuestion 1: If A = [ (x, y) : x 2 + y 2 = 25] and B = [ (x, y) : x 2 + 9y 2 = 144], then A ∩ B contains _______ points. Solution: A = Set of all values (x, y) : x 2 + y 2 = 25 = 5 2 B = [x 2 / 144] + [y 2 / 16] = 1 i.e., [x 2 / (12) 2] + [y 2 / (4) 2] = 1. Clearly, A ∩ B consists of four points.
Quantitative Aptitude-Exercise Questions updated on Apr 2024
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