Advertisements
Advertisements
प्रश्न
Find the mean of all odd numbers from 5 to 20. Find the new mean when each number is multiplied by 4.
उत्तर
The numbers are:
5, 7, 9, 11, 13, 15, 17, 19
`barx = (x_1 + x_2 + x_3 + .... + x_n)/n`
n = 8
⇒ `barx = (5 + 7 + 9 + 11 + 13 + 15 + 17 + 19)/8 `
⇒ `barx = 96/8`
⇒ `barx = 12`
Therefore, Mean of odd numbers from 5 to 20 = 12
If numbers are multiplied by 4, the numbers are:
20,28, 36, 44, 52, 60, 68, 76
`barx = (x_1 + x_2 + x_3 + .... + x_n)/n`
n = 8
⇒ `barx = (20 + 28 + 36 + 44 + 52 + 60 + 68 + 76 )/8`
⇒ `barx = 384/8`
⇒ `barx = 48`
Therefore, Mean of odd numbers from 5 to 20 when multiplied by 4= 48
APPEARS IN
संबंधित प्रश्न
Attempt this question on a graph paper. The table shows the distribution of marks gained by a group of 400 students in an examination.
|
Marks (Less than ) |
10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 |
| No.of student | 5 | 10 | 30 | 60 | 105 | 180 | 270 | 355 | 390 | 400 |
Using scaie of 2cm to represent 10 marks and 2 cm to represent 50 student, plot these point and draw a smooth curve though the point
Estimate from the graph :
(1)the median marks
(2)the quartile marks.
Find the mean of first 10 prime numbers.
Find the mode of the following:
6, 7, 1, 8,6,5, 9, 4, 6, 7, 1,3, 2, 6, 7,8
Find the mode of the following:
21, 22, 28, 23, 24, 21 26, 22, 29, 27, 21, 21, 26, 24, 23
The mean of a certain number of observations is 32. Find the resulting mean, if the observation is, divided by 0.5
Find the mean of: first six even natural numbers
Find the median of the given values : 47, 53, 62, 71, 83, 21, 43, 47, 41
The number of goals scored by a football team is given below. Find the mode and median for the data of 2, 3, 2, 4, 6, 1, 3, 2, 4, 1, 6
Which of the following has the same mean, median and mode?
The median of any data lies between the ______ and ______ observations.
