In an examination, a student attempted 23 questions and
secured 45 marks. If for every correct answer, 3 marks were
awarded and for every wrong answer, 1 mark was deducted,
then how many of his answers were wrong?
Answers
Step-by-step explanation:
Student attempted 23 questions and each question carry 3 marks.
Student secured 45 marjs so
3 ×15 =45
so total correct answer is 15 .
1 marks deducted for wrong answer so 23-15=8
So total 8 answers wrong.
Answer:
The number of questions attempted wrongly by the student = 6 questions
Step-by-step explanation:
Given,
Total questions attempted by the student =23
Total marks secured = 45
The marks for a correct answer = 3
The marks deducted for a wrong answer = 1
To find,
The number of questions attempted wrongly by the student
Solution:
Let 'x' be the number of questions attempted wrongly by the student
Since total number of questions attempted = 23, the number of questions attempted by the students correctly = 23-x
Since the mark for each correct questions is 3 marks, the total marks secured by the student by attempting correct questions = (23-x)3
= 69 - 3x
Since marks deducted for each wrong questions is 1, the mark lost for attempting wrong questions = x
Total marks secured by the student = 69 -3x - x = 69 - 4x
Since, the total marks secured by the student is 45, we have
69 -4x = 45
4x = 69 - 45
= 24
x = 6
The number of questions attempted wrongly by the student = 6 questions
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