Question

9 persons went to a hotel for having their meals. Eight of them spent Rs 12 each over there meals and the ninth spent Rs 8 more than the average expenditure of all the nine. What was the total money spent by them?

Answer 1

9th = avg(9) + 8
9th = (sum(9)/9) + 8
9th= ((sum(8)+9th)/9)+8
9th= ((96+9th)/9)+8
9th*9 = 96+9th+72
9th*8 = 168
9th = 21

=> Total money i.e., sum(8)+9th = 96+21 = 117