Multiple choice

9 person went to a hotel. 8 out of them spent Rs. 120 per person on their food and 9th person spent Rs. 80 more of the average expenditure of 9 persons. What is the amount spent by them ?

  1. Rs.1170

  2. Rs.1230

  3. Rs. 1150

  4. Rs. 1250

  5. Rs. 1125
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A Correct answer
Explanation

Let average expenditure be x. Total expenditure = 9x. Eight people spent 120 × 8 = 960. Ninth person spent x + 80. Therefore: 9x = 960 + x + 80, which gives 8x = 1040, so x = 130. Total amount = 9 × 130 = 1170. The ninth person's expenditure is defined relative to the average.

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