If M is a positive odd integrer, what is the average of a certain set of M integers?

1) The integers in th set are consecutive multiples of 3

2) The median of the set of integers is 33





(1) Insufficient. No way to know the mean. Consider one set {3, 6, 9} and another {6, 9, 12}.
(2) Insufficient. Knowing that there is an odd number of terms in the set and that the median is 33 does not tell us what the mean is.
(1&2) Sufficient. In an ordered set with an odd number of terms, the median is equal to the "middle" term. Moreover, in an equally distributed set of integers (like this one... consecutive multiples of 3) the median will equal the mean itself