Answer:
To expect a profit in the long run, we have to charge more than $1.73 per play.
Step-by-step explanation:
We hace a roulette wit 37 slots.
One is green, eighteen are red and eighteen are black.
The expected pay for the gambler can be calculated as the sum of the probability of getting green, red or black multiplied by the respective pay.
If $1.73 per play is the expected pay that will receive the gambler, we have to charge at least this amount to make sure we will make a profit in the long run.