Question

A U.S. roulette wheel has 38 pockets: 1 through 36, 0, and 00. 18 are black, 18 are red, and 2 are green. A play has a dealer spin the wheel and a small ball in opposite directions. As the ball slows to a stop, it can land with equal probability on the 38 slots. Find the probability of the ball landing on black.

Answer 1

Answer:  9/19

Explanation:

There are 18 black slots out of 38 slots total.

The probability of landing on black is 18/38 = (9*2)/(19*2) = 9/19

I prefer to keep it in fraction form, but if you wanted, the decimal form is 9/19 = 0.4737 approximately. So there's roughly a 47.37% chance of landing on black.