Finding a missing value from the mean
Finding a missing value from the mean.
- Mean = total of values ÷ number of values.
- Mean × count recovers a total. Combine totals before dividing by a combined count.
- Keep exact values until the final rounding step.
Example 1
The mean of five values is 10. Find the missing value.
Required total
Example 2
The mean of five values is 11. Find the missing value.
Required total
Your turn
Question 1
The mean of five values is 12. Find the missing value.
Check answer
Required total
Question 2
The mean of five values is 13. Find the missing value.
Check answer
Required total
Question 3
The mean of five values is 14. Find the missing value.
Check answer
Required total
Question 4
The mean of five values is 15. Find the missing value.
Check answer
Required total
Question 5
The mean of five values is 16. Find the missing value.
Check answer
Required total
The mean of five values is 12. Find the missing value.
Required total
The mean of five values is 13. Find the missing value.
Required total
The mean of five values is 14. Find the missing value.
Required total
The mean of five values is 15. Find the missing value.
Required total
The mean of five values is 16. Find the missing value.
Required total