Number of persons = 9 8 persons amount spent for meal = Rs 30 each Total money = 8 × 30 = Rs 240 The ninth person spent Rs 20 more than the average expenditure of all the nine = 20 + x Where x is the average of all the nine persons Now,
240+20+x
9
=x 260+x=9x x=32.5 Total money spent by all = 240 + 20 + 32.5 =Rs 292.50