HELP ASAP A spinner has ten equal sectors, numbered 1 through 10. What is the probability that the arrow on the spinner will stop on a multiple of 3?

Question

A spinner has ten equal sectors, numbered 1 through 10. What is the probability that the arrow on the spinner will stop on a multiple of 3?

1. 0.1
2. 0.3
3. 0
4. 1

Answer 1

Just remember the mathematical definition of probability:

P(A)= (No. of favorable outcomes) / (No. of possible outcomes)

No. of possible outcomes = 10

Because there are 10 equal sectors.

No. of favorable outcomes = 3

Because there are 3 numbers that are multiples of 3 from numbers 1 through 10 and they are:

3, 6 and 9.

Therefore:

P(A) = 3/10 = 0.3