Multiple choice

Out of 9 persons, 8 persons spent Rs 30 each for their meals. The ninth one spent Rs 20 more than the average expenditure of all the nine. The total money spent by all of them was-

  1. 292.50

  2. 280

  3. 300

  4. 376.75
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Let average expenditure = x. Then 9th person spent x + 20. Total = 8×30 + (x+20) = 240 + x + 20 = 260 + x. But total also = 9x. So 9x = 260 + x, giving 8x = 260, or x = 32.5. Total = 9 × 32.5 = 292.50.

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