Question

A spinner has 15 sections. Some are blue and some are red. The probability of spinning a red is 2/5. How many sections are blue?

Answer 1

The answer to blue is 3/5 since red is 2/5 so to get to 5/5 you ad 3/5 so the answer is 3/5

Answer 2

Given:

The spinner sections = 15

The probability of spinning a red = 2/5

Find-:

How many sections are blue

Explanation-:

The total probability of spinning is 1.

`\text{ Probability of spinning red }+\text{ Probability of spinning blue}=1`

The probability of spinning blue is:

`\begin{gathered} =1-(2)/(5) \\ \\ =(5-2)/(5) \\ \\ =(3)/(5) \end{gathered}`

The blue section is:

`\begin{gathered} =(3)/(5)*15 \\ \\ =3*3 \\ \\ =9 \end{gathered}`

The total 9 sections for blue.