Question

A and B are mutually disjoint sets. then n(A∪B) = ______

Answer 1

Step-by-step explanation:

If A and B are disjoint sets it mean there is nothing common in them

So

N ( A U B) = N (A) + N (B)

Answer 2

Answer:

n(A∪B) = n(A) + n(B)

q

Step-by-step explanation:

if A and B are mutually disjoint sets it means that

A ⋂ B = 0

since

n(A∪B) = n(A) + n(B) - n(A ⋂ B)

n(A∪B) = n(A) + n(B) - 0

n(A∪B) = n(A) + n(B)