Function            average - calculate the average of a set of reals

  Syntax              double average(int n, double element[]);

  Prototype in        mathhk.h

  Remarks             average calculates the average of a set of n
                      numbers of type double.

  Return value        returns the average of a set of n numbers.

  See also            stddev(), summation(), variance()

  Example             #include <mathhk.h>

                      main()
                      {
                           double num[] = { 2.3, 7.1, 6.05 };

                           printf("Average is %lf\n",average(3,num));
                      }

  Program output      Average is 5.15