Question

This is my online maths quiz.
Aswin's average marks for English and Maths for his class XII exam is 85 and his average marks for physics, chemistry and biology is 87.
1.Find his total marks for all the 5 subjects??
420
413
431
442
2.Find his total average??
85.2
86.2
87.2
88.2

Answer 1

Answer:

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In a class test, the sum of Shefali's 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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Solution To Question ID 465307

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Answer

Let the marks in Math be x and in English (30−x).

New marks in Math =2+x

New marks in English =27−x

(2+x)(27−x)=210

54−2x+27x−x

2

=210

x

2

−25x+156=0

x

2

−12x−13x+156=0

x(x−12)−13(x−12)=0

(x−12)(x−13)=0

x=12,13

If her marks in Math is 12, then in English she got 18.

If math mark is 13, then she got 17 in English.