The total marks obtained by a student in Physics, Chemistry and Mathematics together is 120 more than the marks obtained by him in Chemistry .what is the average marks obtained by him in Physics and Mathematics together?
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Answer:
60
Step-by-step explanation:
let marks obtained in Physics, Chemistry and Mathematics are p, c and m respectively.
average marks obtained in Physics and Mathematics together = (p+m)/2
given, p+c+m = c+120
=> p+c+m-c = 120
=> p+m = 120
=> (p+m)/2 = 120/2 = 60
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