8. In a class test (+ 5) marks are given for every correct answer and (-2) marks are given for ever
answer and no marks for not attempting any question.
(a) Pooja scored 80 marks. If Pooja has got 20 correct answers, how many questions did she art
incorrectly?
Answers
Answered by
2
Correct answers = +5
Wrong answers = -2
Total = 80
Number of correct answers = 20
Marks for correct answers = 100
Marks for incorrect answers = (-2) * Incorrect answers
Total marks = Marks for correct answers + Marks for incorrect answers
80 = 100 + (-2) * Incorrect
80 - 100 = (-2) * Incorrect
-20 = (-2) * Incorrect
10 = Incorrect
Hope it helps!
Answered by
0
Step-by-step explanation:
- for every correct answer =5 marks
- for every wrong answer =-2
- total marks scored by pooja = 80
- and correct answer given by pooja =2
- 100-80= 20
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