[" If arithmetic mean of "(a-1),(a+5),(a+11)" and "(a)],[+17)" is "10," find the value of "a.]

If the mean of 17, 10, 12, p and 13 is 14, find the value of P.

If the mean of the data 9, 17, 18, 14, x, 16, 15, 11 and 12 is x, then find the value of x.

The mean of 5, 9, x, 17, and 21 is 13, then find the value of x

If the arithmetic mean of 7, 5, 13, x, 9 and 10 is 10, then value of x is

Insert 5 arithmetic mean between 13 and -11.

find an arithmetic mean between 10(1)/(2 and 25(1)/(2)

Between 1 and 31 are inserted m arithmetic mean so that the ratio of the 7 th and (m-1)th means is 5:9. Find the value of m .

Find 4 arithmetic means between -5 and 15.