Question

many trees were planted by Parth or Pradnya ?
If n(A) = 20, n (B) = 28 and n(A U B) = 36 then n(A n B) = ?
In a class. 8 students out of 28 have a dog as their pet animal at home. 6​

Answer 1

Answer:

n(A n B) = 12

Step-by-step explanation:

n(A) = 20 and n (B) = 28

And we know, n(A U B) = n(A) + n(B) - n(A n B)

So, n(A n B) = n(A) + n(B) - n(A U B) = 20 + 28 - 36 = 48 - 36 = 12