Question

John has a spinner with eight equal sectors with labels from 1 to 8. he spins the spinner once. what is the probability that he gets a number less than 4 or a multiple of 4?

3/4
3/32
1/2
5/8

Answer 1

3/32

Explanation:

Labels from 1 to 8:

The probability that he gets a number less than 4 (1, 2, 3) is 3/8

The probability to get a multiple of 4 (4, 8) is 2/8 = 1/4

So

The probability that he gets a number less than 4 or a multiple of 4:

= 3/8 x 1/4

= 3/32

Answer

3/32

Answer 2

The answer is 5/8.

I saw an answer that gave 3/32, and since I knew that was wrong I wanted to give my answer to not lead others astray.

Explanation:

There are 8 numbers john can pick.

Numbers less than 4 are (1, 2, 3)

Numbers that are a multiple of 4 are (4, 8)

The word "or" in the question implies addition, and adding 3/8 and 2/8 yields a result of 5/8. This is also the answer in the test that I took.