Aspinner is divided equally into four colors, red, green, yellow and blue. find the sum of the probabilities of spinning red, green, yellow, and blue.
a )0
b)1
c)4
d) 1/4

Probability=number of specific outcomes / total number of possible outcomes...

Since they want to know the probability of getting all of the colors the probability is just one.

The sum of all probabilities is always equal to one.  In this case:

1/4+1/4+1/4+1/4=1

X> -2 is the simplified version.