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If 12 members family spend Rs. 850 in 10 days. Then a family of 8 people will spend Rs. 340 in how many days.

Correct answer: C. 6

  • A. 8
  • B. 7
  • C. 6
  • D. 5

Explanation

The spending rate is Rs. 850 ÷ (12 people x 10 days) = Rs. 850 ÷ 120 person-days. For 8 people to spend Rs. 340, the time is Rs. 340 x 120 person-days ÷ (Rs. 850 x 8 people) = 6 days. The likely mistaken answer is 5 days, which does not preserve the direct relationship between total spending and person-days.

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