SOLUTION: A number is selected at random from the numbers 3,5,5,7,7,7,9,9,9,9 the probability that the selected number is their average is

Algebra ->  Probability-and-statistics -> SOLUTION: A number is selected at random from the numbers 3,5,5,7,7,7,9,9,9,9 the probability that the selected number is their average is       Log On


   

Question 823285: A number is selected at random from the numbers 3,5,5,7,7,7,9,9,9,9 the probability that the selected number is their average is
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
3+5+5+7+7+7+9+9+9+9 = 70

Their average is 70÷10 = 7

There are 3 ways to succeed by picking a seven out 
of 10 ways to pick a number.  So the probability is
3%2F7.

Edwin