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ATQ,
Total present age of Ayan, Rohit and Mohan = 27 × 3 = 81 years
Total age of Rohit and Mohan = 30 × 2 = 60 years
So, present age of Ayan = 81 - 60 = 21 years
Since Ayan is 5 years younger than Mohan,
Present age of Mohan = 21 + 5 = 26 years
Then, present age of Rohit = 60 - 26 = 34 years
Required average = (21 + 34) / 2 = 55 / 2 = 27.5 years
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