Question

In the game of roulette, a wheel consists of 38 slots, but only five of them are a multiple of five. The numbers, 5, 25, and 30 are red. While the numbers 15, 20, and 35 are black. There are two green slots with the number 0, 00. Is it statistically unlikely that the metal ball falls into a number that is a multiple of five. Why or why not.

Answer 1

Total number of cases = 38 (total slots)

Favorable number of cases = 5 (multiple of five -5,20 , 25 ,30 ,35)

probability that the metal ball falls into a multiple of five = 5/38 = 0.1316

That is there is 13.16% chance that the metal ball falls into a slot which is multiple of five.

Which is not unlikely

As chance less than 5% is considered unlikely

Thus , it is not unlikely that metal ball falls into a multiple of five slot