Probability Exercise

An urn contains 20 balls, numbered from 1 to 20. Given the experiment of removing one ball, consider the events:

A = [the ball removed has a number thats a multiple of 2]
B = [the ball removed has a number thats a multiple of 5]

So, the probability of event A U B is:

(A) 13/20
(B)4/5
(C)7/10
(D)3/5
(E)11/20