In a lottery, there are 10 prizes and 20 blanks. A lottery is drawn at random. What is the probability of getting a prize?
Choose the correct choice from the following
A) 1/10  B) 2/5  C) 1/3  D) 5/7  E) None
Solution   P(getting a prize)	= 10 / (10+20)   ‹=› 10 / 30   ‹=› 1/ 3.   Answer 1/3
<result>C</result>
In a lottery, there are 10 prizes and 20 blanks. A lottery is drawn at random. What is the probability of getting a prize?