SETS C2

 

If n(A)= 173 , n(B)= 170 and n(AnB)=200, find n(AuB).

 

Solution

 

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

 

             = 173 + 170 – 200

 

             = 333 – 200

 

             = 133

 

Hence n(AuB) = 133 answer

  

TRY THIS…………………………….

 

If n(A)= 187 , n(B)= 169 and n(AnB)=125, find n(AuB).