In a lottery, there are 10 prizes and 15 blanks. A lottery is drawn at random. What is the probability of getting a prize?  Choices:  A) 1/10  B) 2/5  C) 2/7  D) 5/7  E) None
Solution   P(getting a prize)	= 10 / (10+15)   ‹=› 10 / 25   ‹=› 2 / 5.   Answer 2/5
<result>B</result>
In a lottery, there are 10 prizes and 15 blanks. A lottery is drawn at random. What is the probability of getting a prize?