Question

When playing roulette you have 18 chances out of 38 of winning if you bet that the outcome is an odd number. What is the probability value of winning between 0 and 1

Answer 1

Since all the values on the roulette are equally likely to fall, the probability to win equals to the ratio of odd numbers on the roulette to the total number of possible outcomes.

Thus

$$p = \frac{18}{38} = \frac{9}{19}$$