Nine man went to a hotel. Eight of them spent rs 10 each on their meals. The
ninth man spent rs 4 more than the average of all of them. How much did the
ninth man spend?
The first eight men spent rs 80 and the ninth man spent rs x.
The sum that all 9 men spent was 80+x
The average of all nine men was rs
The equation comes from this sentence:
The ninth man spent rs 4 more than the average of all of them.
.
Clear of fractions by multiplying through by 9:
Solution: rs 14.50
Average = =
The ninth man spent rs 14.5 and the others spent rs 10. So
he spent rs 4 more than what the others spent.
Edwin