The average of 5 numbers is 6.8. If one of the numbers is multiplied by a factor of 3, the average of the numbers increases to 9.2. What number is multiplied by 3?
a. 1.5 b. 3.0 c. 3.9 d. 4.0 e. 6.0
This problem is a bit confusing for me. I understand how to solve it now (setup two equations), but still don't fully grasp the concept. Specifically, I don't understand why you can't find the difference between the two means and divide by 3 (which would give you 4 as your answer). Any help would be much appreciated!
a. 1.5 b. 3.0 c. 3.9 d. 4.0 e. 6.0
This problem is a bit confusing for me. I understand how to solve it now (setup two equations), but still don't fully grasp the concept. Specifically, I don't understand why you can't find the difference between the two means and divide by 3 (which would give you 4 as your answer). Any help would be much appreciated!
