In a class, 30% of the students speaks truth, 20% speaks lie and 10% speaks both. If a student is selected at random, what is the probability that he has speak truth or lie? Choose the correct choice:
A) 1/4	B) 2/3	C) 3/5	D) 2/5	E) 2/7
2/5) 2/5
<result>D</result>
In a class, 30% of the students speaks truth, 20% speaks lie and 10% speaks both. If a student is selected at random, what is the probability that he has speak truth or lie?