Question

6. In a test (+5) marks are given for every correct answer and (-2) marks are given for every incorrect
answer.
i. Radhika answered all the questions and scored 30 marks and get 10 correct answers.
ii. Jay also answered all the questions and scored (-12) marks though he got 4 correct answers.
How many incorrect answers had they attempted?

Answer 1

Answer:

1) marks of radhika=30

correct answers=10

no of wrong answer=x

10(+5) +x(-2) =30

50-2x=30

2x=50-30

2x=20

x=20/2=10

so, radhika attempted 10 incorrect questions

2) marks of jay= -12

correct answers =4

wrong answers=y

4(+5) +y(-2) =-12

20-2y=-12

2y=20+12

2y=32

y=32/2=16

so, jay attempted 16 wrong answers