The mean of 30 observations was 15. Upon checking, it was found that two observations were wrongly taken as 2 and 5. If incorrect observations are replaced by the corrected values 7 and 11, then the corrected mean is?

The age distribution of 40 children is as follows

Consider the following statements in respect of the above frequency distribution.

(A) The median of the age distribution is 7 yr.

(B) 70% of the children are in the age group 6-9 yr.

(C) The modal class of the children is 8-9 yr.

Which of the above statements are true?

Choose the correct answer from the options given below:

The median of the observations 1, 13, 7, 19, 18, 15, 32, 28, 23, 24, 31 is:

Match the LIST-I with LIST-II

Choose the correct answer from the options given below:

Find the mean deviation about the median for the following data set:

3, 9, 5, 3, 12, 10, 18, 4, 7, 19, 21.

The average of 3 odd consecutive numbers is 15. What is the sum of first and last numbers?

If mean of the numbers 2, $(2p + 2)$, 7, 13, 17, 4 and $(p - 1)$ is 8, then find their median.