There are ten prizes and twenty-five blanks in a lottery. The winner of a lottery is chosen at random. What are the chances of winning a prize?
A. 1/10
B. 2/5
C. 2/7
D. 5/7
Answer:C
There are ten prizes and twenty-five blanks in a lottery. The winner of a lottery is chosen at random. What are the chances of winning a prize?
A. 1/10 B. 2/5 C. 2/7 D. 5/7
Explanation: P = 10/(10 + 25) = 10/35 = 2/7 (winning a reward).