Question

If A is a subset of B, n(A)=20, n(B)=30. Find n(A ∪ B)

Answer 1

Answer:

50 is the correct answer

Answer 2

Answer:

30

Step-by-step explanation:

n(A)=20, and n(B)= 30

and it is given that setA is subset of Set B therefore all the element of setA found in set B then only 10 element extra in set B so answer is 30