## 3.34 Example Problems

AM and GM of two positive numbers are 25 and 15, respectively. Find HM and the numbers.
Solution (i) (click to see)
Solution (ii) (click to see)

** Example Problem 15**

The mean of 200 numbers was 50. Later it was revealed that two observations were incorrectly given as 92 and 8, instead of 192 and 88, respectively. Find the correct mean.

Solution(click to see)

** Example Problem**

If $$\sum f_i(x_i-k)=0$$, what is the value of k?