(there are more than 4 parts, as per policy i am answering first 4 parts)
1.
money to collect if win = $20 * odds
= $20 * (4)/5
= $16 to be collected
2.
The money is profit as you had paid nothing initially
3.
it was ood against because you get paid in the ratio of teh odds against winning in abet so the ratio of payout is given therefore it is odd against
4.
It tells us that in 9 games it wins 5 times and looses 4 times as the ratio of payout is opposite to ratio of winning and loosing
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