Teaching NVS TGT 2024 Test Series Quantitative Aptitude Number System Quick Math

यदि Q और R दो परिमित समुच्चय इस प्रकार हैं कि n(Q) = 36, n(R) = 40 और n(Q U R) = 50, तो n(Q ∩ R) का मान ज्ञात कीजिये

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