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 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 these answers where correct?

Answer 1

☢☢☢ HEY THERE ☢☢☢

Let the number of correct answers be x,
then incorrect answers are 80-x since 10 are unattempted

-0.5(10)-2(80-x)+4(x)=195
-5-160+2x+4x=195
6x=360

There correct answers=x=60

☢☢☢ HOPE IT HELPS ☢☢☢

☢☢☢ BRAINLY ELITE TEAM ☢☢☢

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