The arithmetic mean of three numbers is 55. if the largest number is 2.5 times the smallest number and the remaining number is twice the smallest number, what is the largest of the three numbers. A. 30 B. 90 C. 60 D. 75

• x+2.5x+2x=5.5x/3=55
  x=55*3/5.5=30
• 5 years agoHelpfull: Yes(3) No(3)
• x+2.5x+2x=5.5x/3=55
  x=55*3/5.5
  x=165/5.5(5.5 have to convert in to whole number 5.5*10/1*10=55/10=11/2)
  x=165/11/2
  x=165*2/11=330/11=30
• 5 years agoHelpfull: Yes(3) No(1)
• it's 75 after solving equation by substituting values of larger and middle number value of smaller number gets as 30 and larger number is 2.5 times of 30 so the answer is 75.
• 5 years agoHelpfull: Yes(3) No(1)
• x+y+z=55(3) --- Arithmetic mean of three numbers //assume smallest number as "x" Largest as "z"
  x+2x+2.5x=165 ---largest number is 2.5 times the smallest number and the remaining number is twice the smallest number
  Solve for X
  x=30 ---u ll get x as 30
  now find the largest of the three numbers //largest is "z" wch is 2.5 times of x
  z=x*2.5
  z=30*2.5
  z=70 is the argest of the three numbers
• 5 years agoHelpfull: Yes(1) No(0)