What is the probability that a number selected at random from the number 1, 2, 2, 3, 3, 3, 4, 4, 4, 4 will be their average?
Total number of possible outcomes = 10
Average of the numbers = 
∴ Number of favorable outcomes, n(E) = 3
30
What is the probability that a number selected at random from the number 1, 2, 2, 3, 3, 3, 4, 4, 4, 4 will be their average?
Total number of possible outcomes = 10
Average of the numbers =
∴ Number of favorable outcomes, n(E) = 3