Question

There is a spinner with 15 equal areas, numbered 1 through 15. If the spinner is spun

one time, what is the probability that the result is a multiple of 3 and a multiple of 5?

Answer 1

Multiples of 3 (3,6,9,12,15)

Multiples of 5 (5,10,15)

Intersections of the sets (15)

Number of acceptable values (1)

Number of possible values (15)

Probability (1/15)

So the probability is 1/15.