sunilkg sunilkg

18-07-2020
Mathematics

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In a test (+5) marks are given for every correct answer and (-2) marks are given for every incorrect answer. i.Radhika answered all the questions and scored 30 marks and get 10 correct answers. ii.Jay also answered all the questions and scored (-12) marks though he got 4 correct answers. How many incorrect answers had they attempted?

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louiscera louiscera

18-07-2020

Step-by-step explanation:

number of correct answer is x and

number of wrong answer is y

according to question

In the case of Radhika

5x-2y=30

x=10

y=10

In the case of Jay

5x-2y=-12

x=4

y=16

incorrect answer by Radhika is 10 and by jay is 16

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