Question

in a class test contens 10 questions 2 marks are given for each correct answer.and -1 mark for wrong answer. Tushar sored 15 marks and attempted all questions. how many questions attempted correctly? how many questions in correct?​

Answer 1

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Answer 2

Explanation:

Given in a class test contains 10 questions 2 marks are given for each correct answer and -1 mark for wrong answer. Tushar sored 15 marks and attempted all questions. how many questions attempted correctly? how many questions in correct?

• Let the correct number of questions be x
• Therefore wrong answers will be 10 – x
• Now we can write the equation as  
•          2 x + (- 1)(10 – x) = 15
•           2x – 10 + x = 15
•                3x = 15 + 10
•                 3x = 25
•                  Or x = 25/3
•                   Or x = 8.33
• Which is not possible.

Reference link will be

https://brainly.in/question/322014