The mean and median of 7 observations are 10 and 9, respectively. If 1 is subtracted from each observation, then the new mean and the new median will respectively be:
Given:
Mean of 7 observations = 10
Median of 7 observations = 9
1 is subtracted from each observation.
We are to find the new mean and median after subtracting 1 from each observation.
Solution:
The new mean will be:
New Mean = Old Mean – 1 = 10 – 1 = 9
The new median will be:
New Median = Old Median – 1 = 9 – 1 = 8
The new mean is 9 and the new median is 8.
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90 Mins English English100 Questions100 Marks90 Mins English English40 Questions30 Marks25 Mins EnglishIf x and y are upper limit of median class and lower limit of modal class, respectively in the following distribution, then what is the value of (2x + y)?
The following is the distribution of ages (in years) of children in a group:
What is the median age (in years) of children ?
The median of the observations 6, 48, 32, 3, 37 and 18 is:
In the following frequency distribution
| Height (in cm) | 140–145 | 145–150 | 150–155 | 155–160 | 160–165 | 165–170 |
| No. of students | 13 | 15 | 9 | 10 | 8 | 5 |
The sum of the upper limit of the modal class and the lower limit of the median class:
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76, 35, 42, 49, 95, 21, 68, 41, 20, 27, 17
The mode and median of data are 36.3 and 62, respectively. What is the mean of the data?
(Use the empirical formula)
The mode and median of a dataset is 52.7 and 65, respectively. What is the mean of the dataset? (Use empirical formula, and round off your answer to one decimal place.)
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