Depending on the value of the individual tickets, the number of lottery tickets in a roll can be 15, 30, 60 or 150. This is because each roll of tickets is standardized at a cost of $300.
The values of the individual ticket within the roll are, respectively, $20, $10, $5 and $2. Therefore the higher the value of each individual ticket in the roll, the fewer the total number of tickets there, and vice-versa. However, with a higher value ticket, the chances of winning increase, while a lower value ticket has a lower chance of winning and recouping the initial purchase costs.