Question

if n(a) =10 n(b) = 7 n (a intersection b) = 5 then find n( a union b)
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Answer 1

Answer:

12

Step-by-step explanation:

n(a)=10

n(b)=7

n(a intersection b)=5

n(a union b)=??

n(aunion b)=n(a)+n(b)-n(a intersection b)

n(aunion b)=10+7-5

Answer 2

Answer:

n ( AUB ) = 12

Given that ;

n ( A ) = 10

n ( B ) = 7

n ( AnB ) = 5

n ( AUB ) = ?

Formula :

n (AUB ) = n ( A ) + n ( B ) - n ( AnB )

n ( AUB ) = 10 + 7 - 5

n ( AUB ) = 17 - 5

n ( AUB ) = 12