Okay, here we have this:
Considering that we need to calculate the probability of getting a multiple of 5 after 1 spin, so remember that the probability of an event is obtained by dividing the favorable events over the possible events:
Favorable events: Favorable events are getting a 5, or a 10; therefore they are two favorable events.
Possible events: There are twelve possible events that can occur.
Finally we obtain:
P(multiple of 5)=2/12
P(multiple of 5)=1/6
