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GATE 2019 CS – Question 4

General Aptitude · Quantitative Aptitude: Arithmetic and Number Computation · 1 mark · Multiple choice

Ten friends planned to share equally the cost of buying a gift for their teacher. When two of them decided not to contribute, each of the other friends had to pay Rs 150 more. The cost of the gift was Rs. ________.

  1. 666
  2. 3000
  3. 6000
  4. 12000

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Correct answer: (C) 6000

Explanation

Let the cost be $C$. Then $\frac C8-\frac C{10}=150$, so $\frac{C}{40}=150$ and $C=6000$.