Question

If n(A×B)=15 and n(A)=3 then n(B) is

Answer 1

Step-by-step explanation:

If a set P has p elements and another set Q has q elements, then the number of elements in (P × Q) is pq, that is, n(P) × n(Q) = n(P × Q). Thus, n(A) × n(B) = n(A × B) Hence, set B has 5 elements

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Answer 2

n(A×B)=15 and n(A)=3 then n(B) is 5