A student scored an average of 80 marks in 3 subjects: Physics, Chemistry and Mathematics. If the average marks in Physics and Mathematics is 90 and that in Physics and Chemistry is 70, what are the marks in Physics?

3 Answers on this Question

1. 80

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2. 80

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3. P+C+M=80
   P+C=70
   Therefore M=10
   Given , P+M=90
   If M=10
   P=80

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