Suppose there are 30 numbers.The average of first 10 numbers is I and the average of last 20 numbers is j. find the relation between I and j.

• this is problem of weighted average.here the equation will be as follows
  10*i + 20*j=30*x (where x is the overall average of 30 numbers in all).
  so i+2j=3x
  this can be the relation
  
• 11 years agoHelpfull: Yes(20) No(2)
• answer=i=2*j
• 11 years agoHelpfull: Yes(1) No(2)
• 10*i+20*j=y
  where y=sum of all the 30 numbers
  
• 11 years agoHelpfull: Yes(0) No(1)