A data set has 20 elements. A second data set of 20
ciements is obtained by adding 7 to each element of the
first set. A third data set of 20 elements is obtained by
multiplying each element of the second data set by 3.
The median of the third data set is 63. What is the medi-
an of the first data set?
A.7
B.14
C.21
D.196
E.210