Question 134
9 men went a hotel. 8 of them spent Rs.30 each over their meals and the 9th spent Rs. 20 more than the average expenditure of all the nine. The total money spent by them is:
Solution
Let the ninth person's expenses be x rupees.
Total expense by the group = x + 240
Average = (x+ 240)/9
But the average is 20 less than x
(x+240)/9 + 20 = x
x + 240 + 180 = 9x
8x = 420
x = 52.5
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