Question

A spinner has 10 ​equal-sized sections. Two of the sections are red.

a. What is the probability that the spinner will land on red​?
b. Use words to describe the probability.

Answer 1

a. Probability of landing on red =
`(1)/(5)`

b. See Explanation

Explanation:

Given

A Spinner

Number of section = 10 (equal sized)

Number of red section = 2

Required

- Probability of landing on red

- Describe the probability in words

Calculating the probability of landing on red

The formula used in calculating probability is as follows

Probability = Number of required outcomes / Number of possible outcomes

In this case, the number of required outcomes is the number of red section.

Hence, number of required outcomes = 2

And the number of possible outcomes is the total section of the spinner

Hence, Number of possible outcomes = 10

By Substitution

Probability of landing on red =
`(2)/(10)`

Probability of landing on red =
`(1)/(5)`

Describe the probability in words

From (a) above, we have that the probability of the spinner landing on color red is
`(1)/(5)`

This means that, for every five times, you spin the spinner, it's likely that one of the outcomes will be red.