# Math Help - probability of winning

1. ## probability of winning

A mail-in sweepstakes posts the information in the table below. There is one grand prize, ten prizes of $100,000, and one hundred prizes of$1,000.
Probability of Winning Prize (\$)
1/20,000,000 1,000,000
1/20,000,000 100,000
1/1,000,000 1,000
Enter values as dollars!

2. ## Re: probability of winning

and the question is?????

3. ## Re: probability of winning

What do you mean by "winning"? Are you asking for the probability of winning any money at all? That is $\frac{1}{20000000}+ \frac{10}{20000000}+ \frac{100}{1000000}$. If you want the mean value, that is a little more complicated, but not much- multiply each of those fractions by the value won, and add.