The average age of a father, mother, and daughter is 26 years. The average age of the mother and daughter is twice the age of the daughter. If the ages of the father and mother are in the ratio 4:3, respectively, then find the age of the father.
ATQ, Total age of father, mother, and daughter = 26 x 3 = 78 years. Let the age of the daughter be 's' years. So, average age of mother and daughter = 2s years. So, sum of ages of mother and daughter = 2 x 2s = 4s years. So, age of the mother = 4s - s = 3s years. So, age of the father = 3s x (4/3) = 4s years. ATQ: 4s + 3s + s = 78 Or, 8s = 78 So, s = 78 / 8 = 9.75 years. So, age of the father = 4s = 4 x 9.75 = 39 years. Therefore, the father is 39 years old.
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