The odds on a bet are 36:1 against.
These odds indicate that if you play 37 times, you are expected to lose 36 times and win 1 time.
Let A:B represent the odds
The probability of the first value, A, can be calculated as:
And the probability of the second value, B, can be calculated as:
Using this, you can calculate the probability of winning:
The odds are against, which indicates that the ratio given is lose-win, so the probability of winning can be calculated as follows:
The probability of winning the bet is 1/37.