"If the mean of 5 observations `x ,\ x+2,\ x+4,\ x+6`and `x+8`is 11, then the mean
Channel: Doubtnut
Date: 2020-04-05

"If the mean
 of 5 observations `x ,\ x+2,\ x+4,\ x+6`
and `x+8`
is 11, then
 the mean of the last three observations is
(a) 11 (b) 13 (c) 15 (d) 17"