If the mean of 20, 18 ,13 ,12, x and 10 is 15, then find the value of x.

If the mean of 10, 12, 18, 13, P and 17 is 15, find the value of P.

If the mean of 10, 12, 18, 13, P and 17 is 15, find the value of P.

If the mean of 10, 12, 18, 13, P and 17 is 15, find the value of P.

If the mean of 10, 12, 18, 13, P and 17 is 15, find the value of P.

Choose the correct atternative answer for each of the following question: If the mean of 12, 13, x, 17, 18 and 20 is 16, what is the value of x ?

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.