Question

Find the number of elements from set X to set Y

if X = {1, 2, 3,} and Y = {a, b}

Answer 1

Given X = {1, 2, 3} and Y = {a, b} 

∴ X × Y = {(1, a), (1, b), (2, a), (2, b), (3, a), (3, b)} 

∴ Number of elements from set X to set Y = 6