In a lottery, there are 10 prizes and 10 blanks. A lottery is drawn at random. What is the probability of getting a prize?	Choose one
A) 1/10
B) 2/5
C) 2/7
D) 5/7
E) 1/2
Solution   P(getting a prize)	= 10 / (10+10)   ‹=› 10 / 20   ‹=› 1 / 2.   Answer 1/2
<result>E</result>
In a lottery, there are 10 prizes and 10 blanks. A lottery is drawn at random. What is the probability of getting a prize?