# Math Help - probability

1. ## probability

A game.
3 coins.
If you roll 3 heads, you get $15. If you roll 3 tails, you get$10.
If you done get either of those things, you lose $5. This is what I did... 15(.125) + 10(.125) - 5(.75) Is this right? 2. Originally Posted by Morgan82 A game. 3 coins. If you roll 3 heads, you get$15.
If you roll 3 tails, you get $10. If you done get either of those things, you lose$5.
15(.125) + 10(.125) - 5(.75)
Is this right?
Yes, that is the expected value.