1.0k views
3 votes
*!!DESPERATE FOR HELP!!*

A spinner is divided into many sections of equal size. Some sections are red, some are blue, and the remaining are green. The probability of the arrow landing on a section colored red is 9 over 20. The probability of the arrow landing on a section colored blue is 6 over 20. What is the probability of the arrow landing on a green-colored section?

User Satendra
by
8.0k points

1 Answer

0 votes
We know that:


P(\text{red})+P(\text{blue})+P(\text{green})=1

so:


P(\text{red})+P(\text{blue})+P(\text{green})=1\\\\\\(9)/(20)+(6)/(20)+P(\text{green})=1\\\\\\P(\text{green})=1-(9)/(20)-(6)/(20)\\\\\\P(\text{green})=(20)/(20)-(9)/(20)-(6)/(20)\\\\\\P(\text{green})=(20-9-6)/(20)\\\\\\P(\text{green})=(5)/(20)\\\\\\\boxed{P(\text{green})=(1)/(4)}
User Mathew Sachin
by
8.1k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories