In a class test (+3) marks are given for every correct answer and (-2) marks are given for incorrect answer and no marks for attempting any question. Radhika scored 20 marks. If she has got 12 correct answers, how many questions she has attempted incorrectly ? Mohini scores (-5) marks in this test, though she has got 7 correct answers. How many questions she has attempted incorrectly?
Answers
Answered by
15
Answer:
Now, we know that for every incorrect answer =−2 marks. So, the total marks for incorrect answers = marks for incorrect answer × number of incorrect answers. Hence, the number of incorrect answers is 8.
Answered by
9
Answer:
the is answer is down
Step-by-step explanation:
Radhika - 12 correct answers means marks scored =12*(+3)=36 for correct answer
Marks scored= 20
correct answer marks= 36
negative marks = 36-20=16
16 marks means no.of questions 16/2=8 questions
Hence 8 questions were answered wrongly
b] Mohini - 7 correct answers means 7*(+3) marks = 21 marks
marks scored = -5
correct answers marks = 21
negative marks =21-(-5)=21+5=26
26 marks means no.of questions =26/2=13 questions
Hence 13 questions were answerd wrongly
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