Question

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 9/20. The probability of the arrow landing on a section colored blue is 6/20. What is the probability of the arrow landing on a green-colored section?

A. 15/20
B. 11/20
C. 6/20
D. 5/20

Answer 1

It’s D. 9/20 + 6/20 = 15/20, which is the probability of getting green and red combined. Since you want to find the probability of landing on the green section, you subtract 15/20 from 20/20 to get 5/20