CBSE BOARD X, asked by DevilWaqas, 1 year ago

In a class test, the sum of Arun's marks in Hindi and English is 30. Had he got 2 marks more in Hindi and 3 marks less in English, the product of the marks would have been 210. Find his marks in the two subjects?

Answers

Answered by umikarao

160

If x is 12 then y = 30-12=18

If x=13 then y = 30-13 = 17

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Answered by shivansh4677

let the marks be x and y

so x+y = 30.......equation one

now (x+2)×(y-3)......

now solve the equations simultaneously

xy-3x+2y-6....equation 2

therefore,

xy-3x+2y=6

3(x+y=30) = 3x+3y=90

=>. xy+5y=96

taking y common

x+5=96/y

therefore x=(96/y)-5

now by putting value of x in equation one 96/y-5+y=0

now solve it,

rishabhagrawal001: madly answered

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