Question

Present ages of ‘A’, ‘B’ and ‘C’ are in the ratio 7:8:9, respectively. If present average age of ‘A’ and ‘C’ is 32 years, then find the age of ‘B’ when ‘C’ was 21 years old?

A 10 years
B 15 years
C 17 years
D 18 years
E None of these
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