Multiple choice

Six girls went to a restaurant for taking their meals. Five of them spent Rs. 10 each on their meals and the sixth spent Rs. 10 more than the average expenditure of all the six. What was the total money spent by them?

  1. 78

  2. 84

  3. 66

  4. 72
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let S be the total sum. Average = S/6. The sixth girl spent 10 + S/6. Sum = (5 * 10) + (10 + S/6) = S. 60 + S/6 = S. 60 = 5S/6. S = 72.

AI explanation

Let the average expenditure of the six girls be x, making the total money spent 6x. The five girls spent Rs. 10 each, so they spent Rs. 50 in total, and the sixth girl spent Rs. (x + 10). This gives the equation 6x = 50 + x + 10, which simplifies to 5x = 60 and x = 12. The total money spent by all six girls is 6 multiplied by 12, which equals Rs. 72.

Keep practicing — related questions