Answer:
0.474
Step-by-step explanation:
Here we have 38 possible cases because all 38 numbers on a roulette ball have a chance of showing up and those chances are equal.
Also, we have 18 even numbers between 1 and 36 excluding 0 and 00.
Probability is a number of favorable cases divided by the number of possible cases, so, finally, the required probability is:
[tex]P=\frac{18}{38}=\frac{9}{19}=0.474[/tex]