Question

Let U denote universal set and A be any set. If n( U ) = 25 and n( A ) = 17, find n ( A' ) ​

Answer 1

Answer:

n(U) = 25

n(A) = 17

n(A') = 25-17 = 8

Answer 2

Answer:

n(A')=8

Step-by-step explanation:

n( U ) = 25 and n( A ) = 17

We know that

A'=U-A

Thus n(A')=n(U)-n(A)

=25-17

=8

Example :

Let U={1,2,3,--------------25}

and A { 1,2,3---------------17}

Then A'=U-A={18,19,20,21,22,23,24,25}

We see that A' is  having 8 elements

so n(A')=8