The mean of 25 observations is 36. If the mean of the first 13 observations is 32 and that of the last 13 observations is 39, then the 13th observation is:

Match List I with List II. Choose the correct answer from the options given below:

The average of five consecutive numbers is a. If the next two numbers are also included, how will the average vary?

In a cricket team of 11 players, the average age is 28 years. Out of these, the average ages of three groups of three players each are 25 years, 28 years, and 30 years respectively. If in these groups, the captain and the youngest player are not included and the captain is eleven years older than the youngest player, then the age of the captain is

Which of the following statements are True?

• A. The mean of x, y, z is y. Then x + z = 2y.
• B. Median of 15, 28, 72, 56, 44, 32, 31, 43 and 51 is 43.
• C. Mode of 2, 3, 4, 5, 0, 1, 3, 3, 4, and 3 is 3.

Choose the correct answer from the options given below:

If the mean of $a$, $b$, and $c$ is $M$; $ab + bc + ca = 0$; and the mean of $a^2$, $b^2$ and $c^2$ is $KM^2$, then $K$ is equal to

Let $a, b, c, d, e, f, g$ be seven consecutive even numbers and $j, k, l, m, n$ be five consecutive odd numbers. What is the average of all numbers?