Question

24. There are 90 multiple-choice questions in a test (a multiple-choice question is one for which some
choices (a), (b), etc., are given and you have to select the correct one). Suppose you get two
marks for every correct answer
. For every question you leave unattempted or answer wrongly,
one mark is deducted from your total score of correct answers. If you get a zero in the test, then
how many questions did you answer correctly?
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Answer 1

Answer:

50

Step-by-step explanation:

total nos of questions = 90 let no of questions answered correctly be X, no of questions answered incorrectly =90-x, total marks obtained = 6O, marked obtained for correct answers =2x, marks deducted for wrong answers = -1(90-x) = -90 + x, therfore 2x - 90 + x = 60, 2x +x = 60 + 90, 3x = 150, X = 150/3 x = 50.