Question

In a competitive exam there are 90 multiple choice questions 4 marks are awarded for every correct answer 2 marks are deducted for every wrong answer and 0.5 marks is deducted for every unattempted question from the total score of correct answer if a student leaves 10 question unattempted and the scores a total of 195 marks how many of his? Answer correct

Answer 1

hey dear your answer is here..
let no of correct answer=x
no of wrong answer=y
no of left answer= 10
so x+y =90-10
×+y=80.........(1)

4x-2y-(10×0.5)=195
4x-2y=200
2x-y=100.......(2)

solution of this equation is in attachment
see
thanks

Answer 2

Answer:

Given :- In a competitive exam there are 90 multiple choice questions 4 marks are awarded for every correct answer,2 marks are deducted for every wrong answer and 0.5 marks are deducted for every unattempted question. from the total score of correct answers.if a students leaves 10 questions unattempted and scores a total of 195 marks, how many of his answers were correct

Solution :-

=> Let the answers correct be 'x'

=>Then, answer wrong = 80

--: According To Condition :-

=>4x-2(80-x) - 10(0.5) = 195

=>4x-160+2x-5 = 195

=>6x = 360

=> x = 60

=> Therefore, correct answer = 60