If the mean of the observations `x,2x+1,2x+5,2x+9` is 30. What is mean of last two observations?

The mean of the observations x-1, x and x + 1 is

True/false If the mean of 5 observation x,x+2,x+4,x+6,x+8 is 11, then the mean of first three observations is 8.

If the mean of five observations x,x+2,x+4,x+6,x+8 is 11, then the mean of first three observations is 9 (b) 11 (c) 13(d) none of these

If the mean of the observation x, x+3, x+5, x+7 and x+10 is 9, then mean of the last three observations is

If the mean of five observation x,x+2,x+4,x+6,x+8 is 11, find the mean of first three observations.

if the mean of the observations x, x+ 4, x + 5, x + 7, x + 9 is 9, then th mean of the last three observations is :

If the mean of the observations : x, x + 3, x + 5, x + 7, x + 10 is 9, the mean of the last three observations is

If the mean of the observations: x, x + 3, x + 5, x + 7, x + 10 is 9, the mean of the last three observations is

Assertion : If the mean of five observations x, x + 2, x + 4, x + 6, x + 8 is 11, then mean of last three observations is 8. Reason : Mean of n observations is equal to Sum of observations upon Number of observations

If the mean of the observation x , x+3 , x+5 , x+7 and x+10 is 9 , then mean of the last three observations is