00:01
So we have a player playing a game and we have a wheel that is being spun and we have a skunk where you win no money or you lose if you continue to spend 100, 200, 500.
00:12
And we want to know on part a, what's the likelihood that the person will spend three times in a row and get a number and not get skunked? and so you have three -fourths multiplied out or three -fourths to the third power and that is 27 over 64.
00:30
Now, we know that the person has already spun three times and has earned $800.
00:36
We don't know how he or she got it, but we know that the person is earned $800.
00:41
And we want to know what the expected value is on winning for the fourth spin.
00:47
So i'm going to let y be the winnings you could get.
00:50
Well, if you land on skunk, you're going to lose everything, so you'll have zero.
00:54
And that has a one -fourth chance of happening.
00:56
If you land on 100, you'd accumulatively have 9.
00:59
Land on 200, accumulated 1 ,000, land on 500, you accumulate have 1 ,300 and each of those has a one -fourth chance...