The average of three numbers is 45.The first number is much more than the average as the second number is less than the average.Find the third number

• if x,y,z are 1st,2nd & 3rd no.s respectively then,
  
  x+y+z=3*45 .......(1)
  x-45=45-y => x+y=90 .......(2)
  
  (1)-(2) => z=45
• 10 years agoHelpfull: Yes(59) No(0)
• Let First number(F),Second(S) and Third(T).
  =>Given, (F+S+T)/3 = 45
  => Also, F=45+x ...(1)
  => and S=45-x ....(2)
  where x is the amount by which first number is more than the average as the second number is less than the average.
  =>(1)+(2)
  =>F+s=90
  =>Substituting in avg equation we get Third number T as,
  =>(90+T)/3=45
  So, answer T=45
• 10 years agoHelpfull: Yes(14) No(0)
• let f be the first number,s be the second number and t be the third number
  given,
  (f+s+t)/3=45
  f+s+t=135.....(1)
  as it is also given that f is more than average and let it be x
  so f=45+x
  as it is also given that s is less than average and let it be x
  so s=45-x
  from the equation
  45+x+45-x+t=135
  90+t=135
  t=135-90
  third number t=45
• 10 years agoHelpfull: Yes(2) No(0)
• take three numbers as x,y,z respectively
  (x+y+z)/3=45
  given that x is greater than 45 by some a value
  y is lesser than 45 by same a value
  therefore (45+a+45-a+z)/3=45
  => 90+z=135
  =>hence z=45
• 10 years agoHelpfull: Yes(2) No(0)
• 45
  let the numbers be x, y ,z
  given (x+y+z)/3=45
  and
  x-45=45-y
  => x+y=90......(1)
  90+z=135.....(2)
  solving these, we get
  z=45
• 10 years agoHelpfull: Yes(2) No(0)
• let the first no. b x more than the average.. i.e first no is 45+x
  then secnd no. will be 45-x
  let the third no. be y
  therefore average will be.. {(45+x)+(45-x)+y}/3= 45
  x will be cancelled..on solving we'l get y =45
• 10 years agoHelpfull: Yes(1) No(0)
• numbers are 45+x,45-x,k
  k=150-90
  =60
  
• 10 years agoHelpfull: Yes(0) No(2)
• a+b+c=45
  a>45 b
• 10 years agoHelpfull: Yes(0) No(0)
• if x,y,z are 1st,2nd&3rd no.s respectively then x=45,y=45,z=45,then x+y+z/3=45.
  given first number must be more than average and second number less than average.
  take x=46>average.
  take y=44
• 10 years agoHelpfull: Yes(0) No(2)
• (a+b+c)/3=45...........(1)
  (a+b+c)=135
  a=45+x (Given)
  c=45-x (Given)
  
  45+x+b+45-x=135
  90+b=135
  b=45.................ans
• 7 years agoHelpfull: Yes(0) No(1)