If you are really are 64 years old, society has failed. Go review statistics, you should have had to take that class in high school. Even if you never took stats, by age 64 we'd expect that you'd know 1) not to gamble and 2) that buying something with a 10% chance to get main prize doesn't mean buying 10 and being guaranteed to get the main prize.
Here's a breakdown of how the odds with the price.
1 container: 10% (0.1) chance to get the tank (approximately $10 + tax)
5 containers: 41% ($45 + tax)
10 containers: 65% ($75 + tax)
13 containers: 75% ($105 (or more) + tax)
20 containers: 88% ($150+tax)
45 containers: 99% ($Are you crazy?)
In the future, you probably should calculate the odds yourself before you spend money on something. I'll save you some time and just give you the formula: (1-.9^(amount of crates you buy)). The .9 is there is if the odds are 10% chance of getting the main prize. If the odds are 20% chance, then it would be .8, and if they were 5%, it would be .95, and so on. Subtract the decimal value of the percentage of winning the main prize from 1.0, and then that's what you put in.)
Edited by I_Maverick_I, 04 November 2018 - 06:57 PM.