Question

Q3 If n (A U B) = 15,n(B) = 40, n( A) = 20; the value of n (A O B) =?​

Answer 1

Step-by-step explanation:

n (A U B) = 15

n(B) = 40

n( A) = 20

since n (A U B) = n(B) + n( A) - n(A O B)

therefore ; n(A O B)= n (A U B) - n(B) - n( A)

= 15-40-20

=15-60= -45

which is not possible so I would suggest you to check the given values and do it by your own by seeing it

thanks

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