average age of A, B and C is 16 and the average age of A and D is 13 than that of A, B and D. find the age of D?
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age of C =16
age of D = 13
so, average age = (A+B+C)/3
= (16+13+C)/3
=(29+C)/3
C=29÷3
C=9.6 years
age of D = 13
so, average age = (A+B+C)/3
= (16+13+C)/3
=(29+C)/3
C=29÷3
C=9.6 years
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