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Q. If the set X has 4 elements and the set Y = {2, 3, 4, 5}, then find the number of elements in X × Y

Answer» HEY There!!!

Given that, n(X) =4 and n(y) = {2,3,4,5} =) (4)

SINCE, n( x × y ) = n(x) × n(y)

=) 4 × 4

=) 16

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