Question

Find the value of "x" if mean of the following data is 9:
12, 5, 3, 18, 10, 17, x, 6, 6.​

Answer 1

Answer:

mean =12+5+3+18+10+17+x+6+6/9

9=77+x/9

77+x=81

x=81-77

x=4