The mean of 5 numbers is 15. If one more number is included, the mean of the 6 numbers becomes 17. Find the included number.

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

Find the median of the following observations.

6, 49, 14, 46, 16, 42, 26, 32, 28

If the mean of 5 observations $x$, $x + 2$, $x + 4$, $x + 6$ and $x + 8$ is 11, then value of $x$:

The mode of the data is:

Mean of the data is:

Salma bought 65 books for ₹ 1050 from one shop and 50 books for ₹ 1020 from another. What is the mean price she paid per book?