In a quiz competition 5 marks are given for correct answer and 1 mark is deducted for og
answer. In total there are 20 questions. Ravi answered correctly 15 questions and scored
70 marks. Gaurav answered correctly 10 questions and scored 40 marks. Find out:
a) how many questions Ravi answered wrongly?
b)for how many questions Gaurav gave wrong replies?
Answers
Step-by-step explanation:
Ravi gave 5 wrong answers and gaurav gave 10 wrong answers
Step-by-step explanation:
Given:-
In a quiz competition 5 marks are given for correct answer and 1 mark is deducted for wrong
answer. In total there are 20 questions. Ravi answered correctly 15 questions and scored
70 marks. Gaurav answered correctly 10 questions and scored 40 marks.
To find:-
Find out:
a) how many questions Ravi answered wrongly?
b)for how many questions Gaurav gave wrong replies?
Solution:-
Given that:
Marks are given for correct answer = +5 marks
Marks are deducted for wrong answer =-1 marks
Total number of questions = 20
Number of questions answered correctly by Ravi = 15
Marks for 15 questions = 15×5 = +75 marks
Marks scored by Ravi = 70 marks
Total score = marks of Answered correctly +marks of answered wrongly
=> 70 = 75+marks for wrong answered questions
=> 70-75 = marks for wrong answered questions
=> -5 = marks for wrong answered questions
=>5×(-1) = marks for wrong answered questions
=> total number of wrong answered questions
=> 5
and
Number of questions answered correctly by Gourav = 10
Total marks for 10 questions = 10×5 = 50 marks
Marks scored by Gourav = 40 marks
=>Total score = marks of Answered correctly +marks of answered wrongly
=> 40= 50+marks for wrong answered questions
=> 40-50 = marks for wrong answered questions
=> -10 = marks for wrong answered questions
=>10×(-1) = marks for wrong answered questions
=> total number of wrong answered questions
=> 10
Answer:-
a) Total number of wrong answered questions by Ravi = 5
b)Total number of wrong answered questions by Gourav = 10