Teaching NVS PGT 2024 Test Series Mathematics Sets Operations on Sets

यदि तीन असंयुक्त समुच्चयों A, B, C के लिए n (A) = 10, n (B) = 6 तथा n (C) = 5 है, तो n (A U B U C) किसके बराबर है?

1
21
2
16
3
15
4
11
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