Question

If n (a)=15,n (b)=29 n (anb)=7 then(aUb)

Answer 1

Answer: 21

Step-by-step explanation:

Given that:

n ( a) = 15

n ( a U b ) = 29

n ( a n b) = 7

To find : n (b)

Using the formula ,

n ( a U b ) = n (a) + n (b) - n ( a n b )

29 = 15 + n (b) - 7

29 = 8 + n(b)

n ( b) = 29-8

=21

Answer 2

Answer:

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