1.

Let A and B are two sets such that n(A)=20 ,n(B)=25 and n(AuB)=35 then find n(AnB)?​

Answer» ONG>Answer:

Step-by-step explanation:

There are 10 elements in a but not in b.

There are 10 elements in both a and b.

There are 6 elements in b but not in a.

So, the total number of elements in the UNION of a and b is 26.

This ILLUSTRATES the general result that n(a ∪ b) = n(a) + n(b) - n(a ∩ b) :

20 + 16 - 10 = 26.



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