Question

*If n(X) = 13, n (Y) = 12 , n ( X U Y) = 28 hen n ( X ∩ Y) = ?*

1️⃣ 12
2️⃣ 2
3️⃣ 3
4️⃣ 25​

Answer 1

option 3rd

3 is the answer

mark it as Brainlest answer

Answer 2

Answer:

3. 3

Step-by-step explanation:

we know,

n(X u Y)=n(X)+n(Y)-n(X intersection Y)

n (X intersection Y) = n(X u Y) - n(X) - n(Y)

=28 - 13-12

= 3