Probability and distribution

Question

Consider a spinner where 1/3 of the area is red, 1/4 is blue, 1/3 is yellow, and 1/12 is green. Let X be the color where the pointer is after spinner once.

1. If you spin once, what is the probability thay you get a color that is not red?

Answer 1

Add up the areas that are not red. That's one way.

Subtract the red area from one. That's another way.

Do you get the same answer both ways? Do you understand both ways? Do you like one way more than another?