Q. Average of three numbers are a,b and c is 180. Also, b is 2a and C is 2.4a. What is the new average if a number 'd', which is three fourth of C, is introduced?

• ans= 180
  a+b+c=180*3
  a+2a+2.4a=180*3
  a(1+2+2.4)=180*3
  a(5.4)=180*3
  a=100
  
  d=3/4c=3/4(2.4a)=1.8*100=180
  
  (a+b+c+d)/4= (180*3+180)/4=180 ans...
• 11 years agoHelpfull: Yes(3) No(0)
• 3*(a+2a+2.4a)=180
  a=100
  b=200
  c=240
  d=180
  new average = (100 + 200 + 240 + 180)/4 = 180
• 11 years agoHelpfull: Yes(1) No(0)
• sorry
  in first line
  (a+2a+2.4a)=180*3
• 11 years agoHelpfull: Yes(1) No(0)
• 180
  a+2a+2.4a= 180*3
  5.4a=540
  a=100
  b=200
  c=240
  d= (3/4)*240
  avg=(100+200+240+180)/4=180
• 11 years agoHelpfull: Yes(0) No(0)
• a+2a+2.4a=540
  a=100,b=200,c=240
  d=3*240/4=180
  new avg=100+200+240+180/4=180
• 11 years agoHelpfull: Yes(0) No(0)