Advertisements
Advertisements
Question
Find the mean of first 10 even natural numbers.
Solution
Given that,
The first 10 natural numbers be 2,4,6,8,10,12,14,16,18,20
∴ Mean = `"Sum of all Numbers "/"Total Numbers"`
`= (2 +4 +6 +8 +10 +12 +14 +16 +18 +20)/10 ` = `110/10`
`= 110/10` = 11
Mean = 11
APPEARS IN
RELATED QUESTIONS
The following number of goals were scored by a team in a series of 10 matches:-
2, 3, 4, 5, 0, 1, 3, 3, 4, 3
Find the mean, median and mode of these scores.
Following are the weights (in kg) of 10 new born babies in a hospital on a particular day:
3.4, 3.6, 4.2, 4.5, 3.9, 4.1, 3.8, 4.5, 4.4, 3.6. Find the mean x.
The mean weight per student in a group of 7 students is 55 kg. The individual weights of 6
of them (in kg) are 52, 54, 55, 53, 56 and 54. Find the weight of the seventh student.
Calculate the mean for the following distribution:
| x : | 5 | 6 | 7 | 8 | 9 |
| f : | 4 | 8 | 14 | 11 | 3 |
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.
For which set of numbers do the mean, median and mode all have the same value?
For the set of numbers 2, 2, 4, 5 and 12, which of the following statements is true?
In the class intervals 10 – 20, 20 – 30, the number 20 is included in ______.
If `barx_1, barx_2, barx_3, ..., barx_n` are the means of n groups with n1, n2, ..., nn number of observations respectively, then the mean `barx` of all the groups taken together is given by ______.
The mean of 25 observations is 36. Out of these observations if the mean of first 13 observations is 32 and that of the last 13 observations is 40, the 13th observation is ______.
