Question 1 - Number of elements in set - 2 sets (Direct) - Chapter 1 Class 11 Sets

Last updated at August 5, 2026 by

Question 1 - If X and Y are two sets n(X) = 17, n(Y) = 23 - Number of elements in Set Formula

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Question 1 If X and Y are two sets such that n(X) = 17, n(Y) = 23 and n (X ∪ Y) = 38, find n(X ∩ Y). n(X) = 17, n(Y) = 23, n(X ∪ Y) = 38 n(X ∩ Y) = ? We know that n(X ∪ Y) = n(X)+ n(Y) – n(X ∩ Y) 38 = 17 + 23 – n(X ∩ Y) 38 = 40 – n(X ∩ Y) n(X ∩ Y) = 40 – 38 n(X ∩ Y) = 2

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