A spinner made up of a piece of card in the shape of a regular pentagon, with a toothpick pushed through its center. The five triangles are numbered from 1 to 5. The spinner is spun until it lands on one of the five edges of the pentagon. What is the probability that the number it lands on is odd?

Solution:

A pentagon has 5 sides: 1, 2, 3, 4, and 5.

Odd Numbers: 1, 3, and 5.

P(odd number) = 3/5

Is this right?