Question

If A and B are two sets such that n(A)=20, n(B)= 25, n(AUB)= 40 then n(A♡B) is
(a) 4
(b) 5
(c) 6
(d) 7​

Answer 1

Answer:

b) 5

Step-by-step explanation:

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

40=20+25-n(AnB)

n(AnB) =5

Answer 2

Answer:

i think A.. here is your qnswer mate no need of tension

Step-by-step explanation:

read this for relax it will refresh your mind