Solution
The number of possible outcomes is 10
We need to find the probability that it is blue
Probability is given as = number of required outcomes/ number of the possible outcome
The probability that the dial Stops on a slice that is blue = 3/10
The probability that the dial Stops on a slice that is NOT blue = 1 - Probability that the dial Stops on a slice that is blue = 1 - 3/10