Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Mathematics Sets Operations on Sets
If X and Y are two sets such that n(X) = 23, n(Y) = 39, and n(XUY) = 49, then find n(X∩Y).
1
13
2
10
3
12
4
More than one of the above
5
None of the above