Teaching EMRS TGT Mock Test 2023 Engineering Mathematics Set Theory & Algebra Set Operations

यदि n(A) = 285, n(B) = 195, n(U) = 500 और n(A ∪ B) = 410 है, तब n(A' ∪ B') का मान क्या है?

1
430
2
340
3
530
4
350
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