Question

total marks obtained by student in maths and physics is 60 and his score in chemistry is 20 marks more than that in physics.find the average marks scored in maths and chemistry together

Answer 1

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HEY,

IN SUCH EXAMPLES DON'T USE MUCH MIND POWER JUST SOLVE BY DOING THE THINGS GIVEN

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GIVEN :

=> MARKS OBTAINED IN PHYSICS + MARKS OBTAINED MATHS :

=> 60

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MARKS OBTAINED IN CHEMISTRY :

=> 20 MARKS MORE THAN PHYSICS

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LET,

=> MARKS OBTAINED IN PHYSICS :

=> X

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MARKS IN PHYSICS + MARKS IN MATHS = 60

=> X + MARKS IN MATHS = 60

=> MARKS IN MATHS = 60 - X

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MARKS OBTAINED IN CHEMISTRY :

=> MARKS IN PHYSICS + 20

=> $\bold{x + 20}$

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TO FIND :

=> THE AVERAGE OF MATHS AND CHEMISTRY :

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AVERAGE :

=> SUM OF OBSERVATIONS / NO. OF OBSERVATIONS

=> ( 60 - X ) + ( X + 20 ) / 2

=> 60 - X + X + 20 / 2

=> 60 + 20 / 2

=> 80 / 2

=> 40

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HENCE THE AVERAGE MARKS IN MATHS AND CHEMISTRY TOGETHER :

=> $\huge\bold{ 40}$

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$\huge\bold{thanks}$

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