The mean of 10 observations is 25. If one observation is removed, mean becomes 24. Find removed value.
34
The total sum of the original 10 observations is \(10 \times 25 = 250\).
After removing one observation, there are 9 observations left with mean 24, so their sum is \(9 \times 24 = 216\).
The removed value equals the difference between the two sums: \(250 - 216 = 34\).
Similar Questions
The median of the data 10, 15, x, 25, 30 is 20. Find x.
A bowler has taken wickets : 0, 3, 2, 1, 5, 3, 4, 5, 5, 2, 2, 0, 0, 1, 2. Find mode.
If the mean of the data is 11, find Z : 3, 21, 10, 7, 6, 9, (Z + 6), 15, 20
Important Questions from Measures of Central Tendency
If X̅ = 20 is the mean of 10 observations x1, x2, ... x10; then what is the value of \(\displaystyle \sum_{i=1}^{10}\left(\frac{3 x_i-4}{5}\right) ?\) ?
What is the mean of the numbers 1, 2, 3, ... 10 with frequencies 9C0, 9C1, 9C2 ..., 9C9, respectively?
Which one of the following measures of central tendency is used in construction of index numbers?
The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number is
The ‘less than’ ogive curve and the ‘more than’ ogive curve intersect at
