Advertisements
Advertisements
Question
Find the mean of the first ten odd natural numbers.
Advertisements
Solution
The first ten odd natural numbers are 1, 3, 5, 7, 9, 11, 13, 15, 17, 19
The mean of the first ten odd numbers
= `"Sum"/"Number of observations"`
=`( 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 ) / ( 10 )`
= `(100)/(10)`
= 10
APPEARS IN
RELATED QUESTIONS
Find the mean of 43, 51, 50, 57 and 54.
In a series of tests, A appeared for 8 tests. Each test was marked out of 30 and averages 25. However, while checking his files, A could only find 7 of the 8 tests. For these, he scored 29, 26, 18, 20, 27, 24 and 29.
Determine how many marks he scored for the eighth test.
Find the mean of all factors of 10.
Find x if 9, x, 14, 18 x, x, 8, 10 and 4 have a mean of 11.
The mean weight of 120 students of a school is 52.75 kg. If the mean weight of 50 of them is 51 kg,
find the mean weight of the remaining students.
The mean of 200 items was 50. Later on, it was discovered that two items were misread as 92 and 8 instead of 192 and 88.
Find the correct mean.
If the mean of observations x, x + 2, x + 4, x + 6 and x + 8 is 11,
find:
(i) The value of x;
(ii) The mean of first three observations.
The mean of 16 numbers is 8. If 2 is added to every number, what will be the new mean?
The mean monthly salary of 10 members of a group is Rs.1,445, one more member whose monthly salary is Rs.1,500 has joined the group. Find the mean monthly salary of 11 members of the group.
The mean of 40 observations was 160. It was detected on rechecking that the value of 165 was wrongly copied as 125 for computation of mean. Find the correct mean.
