The average daily income of a daily wage worker, in the month of March is Rs. 200. If his average income on 1st 13 days of the month is Rs. 80 and on last 15 days of the month is Rs. 120, then find his average income on remaining three days of the month.

His total income in the month = 31 × 200 = Rs. 6200

His income of 1st 13 days = 13 × 80 = Rs. 1040

His income in last 15 days = 15 × 120 = Rs. 1800

Therefore, his income in the remaining two days = 6200 – (1040 + 1800) = Rs. 3360

Required average = (3360/3) = Rs. 1120

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