Advertisements
Advertisements
प्रश्न
Find the mean of the following data:
| x : | 19 | 21 | 23 | 25 | 27 | 29 | 31 |
| f : | 13 | 15 | 16 | 18 | 16 | 15 | 13 |
उत्तर
| x | f | fx |
| 19 | 13 | 247 |
| 21 | 15 | 315 |
| 23 | 16 | 368 |
| 25 | 18 | 450 |
| 27 | 16 | 432 |
| 29 | 15 | 435 |
| 31 | 13 | 403 |
| N =106 | `sumfx = 2650` |
∴ `Mean barx = (sumfx)/ N = 2650 / 106 = 25`.
APPEARS IN
संबंधित प्रश्न
Find the mean of first five natural numbers .
Find the missing frequencies in the following frequency distribution if its known that the mean of the distribution is 50.
| x | 10 | 30 | 50 | 70 | 90 | |
| f | 17 | f1 | 32 | f2 | 19 | Total =120 |
Find the median of the following data (1-8)
41, 43, 127, 99, 71, 92, 71, 58, 57
Find the mode of the following data :
7, 9, 12, 13, 7, 12, 15, 7, 12, 7, 25, 18, 7
The demand of different shirt sizes, as obtained by a survey, is given below:
| Size: | 38 | 39 | 40 | 41 | 42 | 43 | 44 | Total |
| No of persons(wearing it) | 26 | 39 | 20 | 15 | 13 | 7 | 5 | 125 |
Find the modal shirt sizes, as observed from the survey.
If the mean of 2, 4, 6, 8, x, y is 5, then find the value of x + y.
Find the median of the observations, 59, 75, 68, 70, 74, 75, 80.
If the mean of the observations: x, x + 3, x + 5, x + 7, x + 10 is 9, the mean of the last three observations is ______.
Median of the following numbers: 4, 4, 5, 7, 6, 7, 7, 12, 3 is ______.
A class consists of 50 students out of which 30 are girls. The mean of marks scored by girls in a test is 73 (out of 100) and that of boys is 71. Determine the mean score of the whole class.
