The average age of eleven players of a cricket team decreases by 2 months when two new players are included in the team replacing two players of ages 17 years and 20 years. The average age of new players is

• Avg age of 11 player = x years (say)
  So x= (17+20)/2 = 18.5 = 18(6/12)
  Let avg age of two new players is y years.
  (9x + 2y)/11 = 18(4/12) = 55/3
  => 9x + 2y = 55*11/3
  => 2y = 55*11/3 - 9*55/3
  => y = 211/3 = 17(7/12)
  The avg age of two new players is 17years 7 months
  
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