Advertisements
Advertisements
प्रश्न
Find the mean of x + 3, x + 5, x + 7, x + 9 and x + 11.
Advertisements
उत्तर
The given values are x + 3, x + 5, x + 7, x + 9, x + 11
We know the mean is given by,
Mean = `"Sum of the elements"/"Total number of elements"`
Here, the number of observations = 5.
`"Mean" = ( x + 3 + x + 5 + x + 7 + x + 9 + x + 11 )/(5)`
= `(5x + 35)/(5)`
= `(5 (x + 7))/5`
= x + 7.
APPEARS IN
संबंधित प्रश्न
The mean of 15 observations is 32. Find the resulting mean, if the observation is: Decreased by 7
The mean of 18, 24, 15, 2x + 1 and 12 is 21. Find the value of x.
The mean weight of 60 students in a class is 40 kg. The mean weight of boys is 50 kg while that of girls is 30 kg. Find the number of boys and girls in the class.
The mean of x, x + 2, x + 4, x + 6 and x + 8 is 11, find the mean of the first three observations.
For the set of numbers given below, find mean: 3, 0, 5, 2, 6, 2
A test out of 25 marks was given to 16 students and marks scored are recorded below: 25, 8, 14, 20, 16, 22, 10, 15, 8, 7, 24, 18, 19, 6, 11, 14
In the report, marks were entered out of 50. What is the mean of the recorded marks in the report?
In History project, marks out of 20 were awarded to 8 students. The marks were as shown below: 14, 16, 18, 14, 16, 14, 12, 16
Each of the above students was 2 extra marks for submitting the project a week before the due date. What is the revised mean of this group?
The mean of 16 natural numbers is 48. Find the resulting mean, if each of the number is increased by 50%
The mean of 4 observations is 20. If one observation is excluded, the mean of the remaining observations becomes 15. Find the excluded observation.
A boy scored the following marks in various class tests during a term, each test being marked out of 20.
15, 17, 16, 7, 10, 12, 14, 16, 19, 12, 16
What is his mean marks?
