Thread: 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!

and the question is?????

What do you mean by "winning"? Are you asking for the probability of winning any money at all? That is . 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.