Advertisements
Advertisements
प्रश्न
The mean of 15 observations is 32. Find the resulting mean, if the observation is: Decreased by 7
Advertisements
उत्तर
Given that the mean of 15 observations is 32
resulting mean decreased by 7
= 32 - 7
= 25
APPEARS IN
संबंधित प्रश्न
The mean of 15 observations is 32. Find the resulting mean, if the observation is: Increased by 60%
The mean of 15 observations is 32. Find the resulting mean, if the observation is: Decreased by 20%
Find the mean of 8, 12, 16, 22, 10 and 4. Find the resulting mean, if the observations, given above, be: multiplied by 3 and then divided by 2.
The heights (in cm) of the volleyball players from team A and team B were recorded as:
Team A: 180, 178, 176, 181, 190, 175, 187
Team B: 174, 175, 190, 179, 178, 185, 177
Which team had a greater average height?
Find the median of team A and team B.
The average of n numbers x1, x2, x3 ….. xn is A. If x1 is replaced by ( x+ α )x1, x2, is replaced by ( x+ α )x2 and so on.
Find the new average.
Find the mean of the following data: 30, 32, 24, 34, 26, 28, 30, 35, 33, 25
(i) Show that the sum of the deviations of all the given observations from the mean is zero.
(ii) Find the median of the given data.
The marks obtained by 10 students are listed below:
2, 5, 3, 8, 0, 9, x, 6, 1, 8
If the mean marks is 5, find x.
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 4 observations is 20. If one observation is excluded, the mean of the remaining observations becomes 15. Find the excluded observation.
The mean monthly income of 8 men is Rs. 8079.75. A man whose monthly income is Rs. 8280 has also been taken into consideration. Calculate the mean monthly income of all the men.
