Teaching DSSSB PGT Mock Test 2025 Mathematics Relations and Functions Operations on Relations

यदि A और B दो परिमित समुच्चय हैं, तो n (A × B) क्या होगा?

1

n (A) + n (B)

2

n (A) × n (B)

3

n (A) ÷ n (B)

4

n (A) - n (B)

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