Question
In a family of four, the average age of Anu, Ben, Carla,
and Dan is 28 years. The ratio of Carla's to Eva's present ages is 5:6, and Ben's age is 20% less than Eva's. Determine Eva's age if Carla will be twice as old as Anu 6 years from now.Solution
ATQ, Let Carla and Eva's ages be 5z years and 6z years, respectively. 
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