The average age of person at a party if 17 with a mean absolute deviation of 2.
Based on the statement which of the following statements must be true?
a) At the party, no one is 17.
b) The average distance each person’s age is away from the mean is 2.
c) Everyone at the party must be between 15 and 19 years old.
d) Everyone at the party is 17 years old.