the average age of sons and their father is 20 years. If the average age of sons is 10 years, find the age of their father?
mudrabhandari1p4cb5t:
how many sons??
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Ans: The average is 3,
30
how can u find exact answer when no. of sons is not specified
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n is the total number of son+father
so n-1 will be the number of sons
so solving this you'll get the age of the father F
S is the summation of ages of (n-1) sons
so n-1 will be the number of sons
so solving this you'll get the age of the father F
S is the summation of ages of (n-1) sons
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