Consider the set
Which is a true statement?
(a) 15 is the mean of the data set.
(b) 15 is the median of the data set.
(c) 15 is the mode of the data set.
(a) and (c) only
(a) , (b), and (c)
(a) and (b) only
(b) and (c) only
None of the three
If
what is
?