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प्रश्न
Find the mean of: 5, 2.4, 6.2, 8.9, 4.1 and 3.4
उत्तर
Mean of 5, 2.4, 6.2, 8.9, 4.1 and 3.4
Required mean = `"Sum of data values"/"No. of. data values"`
`= (5 + 2.4 + 6.2 + 8.9 + 4.1 + 3.4)/6`
`= 30/6 = 5`
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संबंधित प्रश्न
The following are the marks obtained by 70 boys in a class test:
| Marks | No. of boys |
| 30 – 40 | 10 |
| 40 – 50 | 12 |
| 50 – 60 | 14 |
| 60 – 70 | 12 |
| 70 – 80 | 9 |
| 80 – 90 | 7 |
| 90 – 100 | 6 |
Calculate the mean by:
Step-deviation method
Using the information given in the adjoining histogram, calculate the mean.
By drawing an ogive, estimate the median for the following frequency distribution:
| Weight (kg) | 10 – 15 | 15 – 20 | 20 – 25 | 25 – 30 | 30 – 35 |
| No. of boys | 11 | 25 | 12 | 5 | 2 |
In a case of 40 students, marks obtained by the students in a class test (out of 10) are given below:
| Marks | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Number of students | 1 | 2 | 3 | 3 | 6 | 10 | 5 | 4 | 3 | 3 |
Calculate the following for the given distribution:
(i) Median
(ii) Mode
Find the mean of first 12 even numbers.
Find the mode of the following:
20, 20, 30, 30, 30, 30, 35, 40, 40, 45, 45, 45, 50, 55, 60, 60, 60 ,65, 70, 70, 70
Find the median of the following:
25, 34, 31, 23, 22, 26, 35, 29, 20, 32
Find the median of:
241, 243, 347, 350, 327, 299, 261, 292, 271, 258 and 257
The mean of 5 numbers is 27. If one new number is included, the new mean is 25. Find the included number.
Find the mean and the median of: 5, 8, 10, 11,13, 16, 19 and 20
