Advertisements
Advertisements
प्रश्न
Find the mean of the following set of numbers:
6, 9, 11, 12 and 7
उत्तर
`barx = (x_1 + x_2 + ...... + x_n)/n`
Here, n = 5,
∴ `barx = (6 + 9 + 11 + 12 + 7)/5`
= `45/5`
= 9
APPEARS IN
संबंधित प्रश्न
Marks obtained (in mathematics) by 9 students are given below:
60, 67, 52, 76, 50, 51, 74, 45 and 56
- Find the arithmetic mean.
- If marks of each student be increased by 4; what will be the new value of arithmetic mean?
The mean of the number 6, ‘y’, 7, ‘x’ and 14 is 8. Express ‘y’ in terms of ‘x’.
Find the median and mode for the set of numbers:
2, 2, 3, 5, 5, 5, 6, 8 and 9
Find the mode of the following:
3, 4, 5, 7, 6, 3, 5, 4, 3, 5, 6, 4, 7, 5, 4, 5, 4, 3, 4, 5, 7, 6, 5, 6, 6, 7
Find the mode of the following:
15, 17, 16, 17, 10, 12, 14, 16, 19, 12, 16, 15, 16
Find the mode of the following frequency distribution:
| Variate | 20 | 21 | 22 | 23 | 24 | 25 | 26 |
| Frequency | 21 | 20 | 26 | 35 | 22 | 13 | 10 |
Find the mean of first five prime numbers.
Calculate the median of the following sets of number:
1, 9, 10, 8, 2, 4, 4, 3, 9, 1, 5, 6, 2 and 4.
Find the median of first nine even natural numbers.
The marks of 200 students in a test were recorded as follows:
| Marks % |
0-10 | 10-20 | 20-30 | 30-40 | 40-50 | 50-60 | 60-70 | 70-80 | 80-90 | 90-100 |
| No. of students |
5 | 7 | 11 | 20 | 40 | 52 | 36 | 15 | 9 | 5 |
Using graph sheet draw ogive for the given data and use it to find the,
- median,
- number of students who obtained more than 65% marks
- number of students who did not pass, if the pass percentage was 35.
