Multiple choice

The following questions are accompanied by three statement A, B and C. You have to determine which statement(s) is/are necessary/sufficient to answer the question. What is the monthly salary of Amit? (A) Amit's monthly salary is Rs. 3000 more than that of Billa. (B) The ratio of monthly salaries of Amit and Billa is 5 : 4 (C) The annual salary of Billa is Rs. 46800.

  1. Only A & B together.

  2. Only B & C are together

  3. All A, B & C are necessary

  4. Any two of them are sufficient

  5. A, B & C even together are not sufficient.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

With A and B: A = B+3000 and A/B = 5/4 gives B=12000, A=15000. With B and C: A/B = 5/4 and B = 46800/12 = 3900 gives A = 4875. With A and C: A = B+3000 and B = 3900 gives A = 6900. Each pair of statements uniquely determines Amit's salary.

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