Question

What is the probability that a number selected at random from the numbers 1,2,2,3,3,3,4,4,4,4 will be their average?

Answer 1

Average of following set of numbers is (1+2+2+3+3+3+4+4+4+4)/10 = 30/10 = 3

Probability of getting 3 = no.of times 3 appears/ total no.
= 3/10

Probability that no is the average = 3/10



@_@

Answer 2

average probability =3/10