Inaclasstest containing10questions,5marksareawarded foreverycorrectanswerand(–2)marks
are awarded for every incorrect answer and 0 marks for each not attempted.
(a) Ravi gets 4 correct and 6 incorrect answers. What is his score?
(b) Amit gets 3 correct and 5 incorrect answers. What is his score?
(c) Vivek gets 7 correct and 2 incorrect answers. What is his score?
Answers
Answer:
Ncert solutions
Grade 7
Mathematics
Science
Chapters in NCERT Solutions - Mathematics, Class 7
Exercises in Integers
Question 7
Q7) In a class test containing 10 questions, 5 marks are awarded for every correct answer and (–2) marks are awarded for every incorrect answer and 0 for questions not attempted.
(i) Mohan gets four correct and six incorrect answers. What is his score?
(ii) Reshma gets five correct answers and five incorrect answers, what is her score?
(iii) Heena gets two correct and five incorrect answers out of seven questions she attempts. What is her score?
Solution
Transcript
Solution 7)
(i) Mohan get 4 correct answer = 4\times5\ =20\ 4×5 =20
He gets 6 incorrect answer = 6\times\left(-2\ \right)=\ -126×(−2 )= −12
Total score = 20-12\ =\ 8\ 20−12 = 8
Thus, mohan get 8 marks in the class test.
(ii) For 5 correct answer = 5\times5\ =\ 255×5 = 25
For 5 incorrect answer = 5\times\left(-2\right)=\ -105×(−2)= −10
Total score = 25-10\ =\ 1525−10 = 15
(iii) Heena get 2 correct answer = 5\times2=\ 105×2= 10
Heena get 5 incorrect = 5\times\left(-2\right)\ =\ -105×(−2) = −10
Total score = 10\ -10\ =\ 010 −10 = 0
Thus, total score of heena is zero.
Step-by-step explanation:
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