The average of 11 numbers is 50. If the average of first 6 numbers is 49 and that of last 6 is 52.Find the 6th number.

• 11*50=550
  6*49=294
  6*52=312
  550-(294+312)=56 =ans
• 5 years agoHelpfull: Yes(2) No(0)
• shorter process
  
  50*11 - (6*52-6*49) = 56 (ans)
• 6 years agoHelpfull: Yes(1) No(3)
• The question is wrong first 5 number instead of first 6 number........
• 8 years agoHelpfull: Yes(0) No(4)
• you are wrong ANURADHA .....huh :/
• 7 years agoHelpfull: Yes(0) No(0)
• X1+X2+X3+X4+X5+X6=49*6=294.................(i)
  X6+X7+X8+X9+X10+X11=52*6=312............(ii)
  add (i) & (ii)
  X1+X2+X3+X4+X5+X6+X6+X7+X8+X9+X10+X11=294+312
  X6=606-550=56(ans)
• 5 years agoHelpfull: Yes(0) No(0)
• Assume they are divide into 5=1=5
  Take any 1 overlap
  =1=5 (1+5=last 6)produces an effect of +2
  This should be negated by the remaining numbers ie 5= by a -2 effect for the avg to be 50
  but 5=1 produces -1 effect meaning =1= has a +1 effect on the first 5 when taken with them
  Thus we take 6*+1 =6 and add to the Avg 50
  You can do this with any grouping 1st 5 and 6
  Or First 6 and 5
• 3 years agoHelpfull: Yes(0) No(0)