The total age of A and B is 12 years more than the total age of B and C. Who is younger among A and C, and by how many years?
age of A and B = 12 +(B + C)
A + B = 12 +Â (B + C)
= A- C =12
A = 12 + C
so A is elder and C is younger by 12 years
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