The average wages of a worker during a fortnight comprising 13 consecutive working days was Rs.80 per day. During the first 6 days, his average wages was Rs.77 per day and the average wages during the last 6 days was Rs.84 per day. What was his wage on the 7th day?
74
Wage on 7th day (in Rs.)
= (Total income for 13 days) – (Income for first 6 days) – (Income for last 6 days)
= (13 x 80) - (6 x 77) - (6 x 84) = Rs.74.