Question

If the mean of 5 observations x,x+2,x+4,x+6,x+8 is 11 then the mean of 3 observation is

Answer 1

09-Feb-2017 · (x+x+2+x+4+x+6+x+8)÷5=11 (5x+20)÷5=11 5x+20=55 5x=35. X=7. First observation=x=7. Second observation=x+2=7 +2=9. Third observation=x+4=7+4=11 I.e their