Question

n(A×B)=20 and B= {1,2,3,4} then n(A) is

¡) 6 ¡¡) 5 ¡¡¡) 4 iv) 7​

Answer 1

Answer:

ii) 5

Step-by-step explanation:

n ( A × B ) = 20

B = { 1, 2, 3, 4 }

n ( B ) = 4

n ( A × B )

n ( A ) = ———————

n ( B )

= 20 / 4

= 5