Multiple choice

The total marks obtained by Rani in Physics, Chemistry and Mathematics is 130 more than the marks obtained by her in Chemistry. What is the average marks obtained by her in Physics and Mathematics together?

  1. 65

  2. 60

  3. 55

  4. 50
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A Correct answer
Explanation

Let P, C, M be marks in Physics, Chemistry, and Mathematics. The statement means P + C + M = C + 130. Cancel C from both sides to get P + M = 130. The average of Physics and Mathematics marks is (P + M)/2 = 130/2 = 65.

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