00:01
We are told the pto is selling raffle tickets.
00:04
Each ticket cost $3.
00:07
Only, they're going to sell 100 tickets, but only one wins.
00:20
And the one that wins pays out $86.
00:26
Now there's a few questions we want to answer.
00:31
First, what is the expected value of a ticket to you? well, you pay $3, so right away you have a minus 3.
00:40
The expected winnings from that ticket.
00:45
Well, if there's 100 tickets, but only one wins, and it pays $86, there's only $86 in winnings out of 100 tickets.
00:56
So the expectation that you get from winning is $86 out of 100 tickets.
01:05
So we have negative 3 plus .86, and the expectation is that we will lose $2 .14...