Teaching EMRS PGT Mock Test 2023 Mathematics Sets Set Theory and types of Sets

 माना A और B दो परिमित सेट इस प्रकार हैं कि n (A) = 20, n (B) = 28 और n (A U B) = 36, n (A ∩ B) ज्ञात कीजिये?

1
12
2
16
3
17
4
20
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