Question

1 point
n(A)=20, n(B)=15 and n(An
B)=10 then what is the value of
AU B. *
15
25
O 30
O 35
O This is a required question​

Answer 1

Answer:

Step-by-step explanation:

I think the question is  card(A)=20,card(B)=15,card(A∩B)=10, then what iscard(A∪B)  

You can solve this question by drawing a picture like this to visualize the problem.

Thus the answer is  card(A∪B)=card(A)+card(B)−card(A∩B)=25