Question #da231
1 Answer
Aug 27, 2017
Explanation:
The mean of a data set is the average of all of its elements.
#"mean" = "sum of all elements" / "number of elements"#
For instance, the mean of
Similarly, the mean of
#(70+62+67+x)/4#
We are told the mean is equal to
#66 = (70+62+67+x)/4#
#66 * 4= 70+62+67+x#
#264 = 199 + x#
#x = 65#