booklitogunz8740 booklitogunz8740
  • 03-10-2019
  • Mathematics
contestada

Find the value of n(An B) if n(A) = 9, n(B) = 11, and n(AUB) = 15. n(An B) = (Type a whole number.)

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wagonbelleville wagonbelleville
  • 03-10-2019

Answer:

n(A∩B) = 5

Step-by-step explanation:

given,          

n(A) = 9                    

n(B) = 11                      

n(A U B) = 15                          

we need to find n(A∩B) = ?                              

using formula,                    

          n(A U B) = n(A) +  n(B)  -  n(A∩B)

           n(A∩B) =  n(A) +  n(B) - n(A U B)

           n(A∩B) =  9 +  11 - 15

           n(A∩B) = 5

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