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In a class test, the sum of Shefalis marks in Mathematics and English is 30. Had she got 2 marks more in Mathematics and 3 marks less in English, the product of their marks would have been 210. Find her marks in the two subjects. |
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Answer» Let maths marks=x Then english marks=30-x If she had got maths marks=x+2 Then she had got english marks=27-x According To Question (x+2)*(27-x)=210 27x-`x^2`+54-2x=210 `x^2`-25x+156=0 x(x-12)-13(x-12)=0 (x-12)(x-13)=0 x=12,13 If x=12 then english marks will be 18 if x=13 then english marks will be 17. |
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