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Let the present age of 'M' be '4y' years.
Present age of 'N' = 1.25 X 4y = '5y' years
Present age of 'P' = (4y + 5y) ÷ 2 = 4.5y years
So, 4y + 4.5y = 40 - 3 - 3
Or, 8.5y = 34
Or, 'y' = 4
Now, 'b' = 5 X 4 = 20 years
Present age of 'P' = 4.5 X 4 = 18 years
Therefore, required age of 'P' = 18 + (20/4) = 23 years
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