A spinner has the numbers 1 through 9. The spinner is spun once. What is #P(3,6, 8)#?

1 Answer

#1/3#

Explanation:

I'll assume there is an equal probability for getting any of the numbers (i.e. it's a "fair spinner").

For each result, there is a #1/9# probability of getting it (spinning a 1 has probability #1/9#, etc.)

And so there is a #1/9# probability of spinning a 3. And the same goes for spinning a 6 and also for spinning an 8. So we have:

#1/9+1/9+1/9=3/9=1/3#