railway RRB Technician Grade 1 Mock Test 2024 Mathematics Sets Operations on Sets

यदि P और Z दो सम्मुचय इस प्रकार हैं कि n(P) = 19, n(Z) = 27 और n(P ∪ Z) = 38 है, तो n(P ∩ Z) का मान ज्ञात करें।

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