- A14.6
- B12.6
- C27.2
- D13.6
Step-by-Step Solution
Sum of . New total = 96 + 18 + 22 = 136. New mean = 136 / 10 = 13.6.
Answer: D) 13.6
8 observations have a mean of 12.
Two new observations, 18 and 22, are added to the data.
Find the new mean of all 10 observations.
Class 7Arithmetic MeanData Handling
Master this chapter in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Arithmetic Mean practice questions
More Class 7 Arithmetic Mean practice
Five consecutive whole numbers have a mean of 12. The numbers are evenly spaced around…The mean monthly income of a family of 5 in Bhopal is ₹8,000. If one earning member who…A set of 6 numbers has a mean of 30. If each number is multiplied by 2, what is the mean…Given that 9, 12, 15, 18 and x have a mean of 14, first find x, then state the largest…Priya found the mean of 5 observations to be 20. Later she discovered that an…