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02-05-2021
Mathematics

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In a class test, +4 marks were awarded for the correct answers and -1 mark for the wrong answers. Student scores 40 marks. If his correct answers were 11, find his wrong answers.

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02-05-2021

Step-by-step explanation:

Let y the number of wrong answers got.

[tex]11( + 4) + ( - 1)y = 40 \\ 44 - y = 40 \\ - y = - 4 \\ y = 4[/tex]

∴ He got 4 wrong answers.

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