If n(A)=4 and n(B)=5 then what is n(A × B)?
यदि n(A)=4 और n(B)=5 है तो n(A × B) कितना होगा?
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Correct Answer
C. 20
ExplanationStep 1: Cartesian product counts ordered pairs. Step 2: n(A × B)=n(A)×n(B)=4×5=20. Step 3: Each A element pairs with each B element.
Step 1: Cartesian product में ordered pairs गिने जाते हैं। Step 2: n(A × B)=n(A)×n(B)=4×5=20। Step 3: हर A element हर B element से pair बनाता है।