Nine persons went to a hotel for taking their meals .Eight of them spent Rs. 12 each on their meals and the ninth spent Rs. 8 more than the average expenditure of all the nine . what was the total money spent by them ?
Sol. Let the average expenditure of all the nine be Rs. `x`
Then , 12 x 8 + (`x` + 8) = `9x`
or 8`x` = 104
or `x` = 13
`:.` Total money spent = `9x` = Rs. 9 x 13 = 117
= Rs. 117.
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