The average of six numbers is X and the average of three of these is Y.If the average of the remaining three is z, then
A. x = y + z
B. 2x = y + z
C. x = 2y + 2z
D. None of these

• average*no of terms gives the total of digits.
  total of 6 digits=6x
  total of any 3 digits=3y
  total of other 3 digits=3z
  so total of six digits=6x=3y+3z
  or 2x=y+z(dividing the whole equation by 2)
• 12 years agoHelpfull: Yes(2) No(1)