In a lottery, there are 10 prizes and 25 blanks. A lottery is drawn at random. What is the probability of getting a prize?
$ \dfrac{1}{10} $
$ \dfrac{2}{5} $
$ \dfrac{2}{7} $
$ \dfrac{5}{7} $
Explanation:
P [getting a prize] =$ \dfrac{10}{(10 + 25)} $=$ \dfrac{10}{35} $=$ \dfrac{2}{7} $.