Question

Q16. If A and B are two sets such that n(A) = 19, n(B) = 21, n(A ∩ B) = 2 then find n(A ∪ B).
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Answer 1

Answer:

n(A U B)=n(A intersection B ) -n(a) +n(B)

Answer 2

Answer:

$\huge{\boxed{\rm{\pink{n(AUB)=38}}}}$

Step-by-step explanation:

Given:-

If A and B are two sets such that

n(A) = 19,

n(B) = 21,

n(A ∩ B) = 2

To find:-

find n(A ∪ B).

Solution:-

If A and B are two sets such that

n(A) = 19,

n(B) = 21,

n(A ∩ B) = 2

We know that

Using formula:-

n(AUB)=n(A)+n(B)-n(A ∩ B)

=>n(AUB)=19+21-2

=>n(AUB)=40-2

=>n(AUB)=38

Solution:-

n(AUB)=38