college math
posted by Rose .
A box of chocolates contains 20 identically shaped chocolates. Five of them are filled with jelly, three are filled with caramel, and twelve are filled with nuts. What is the probability that one chocolate chosen at random is filled with jelly, caramel, or nuts?

The probability is exactly one. All the chocolates are filled with either jelly, caramel, or a nut.

Thanks bobpursley, I appreciate your help.