Question

In a test (+5) marks are given for every correct answer and (-2) marks are given for every incorrect
answer.
(a) Radhika answered all the questions and scored 30 marks and get 10 correct answers.
(b) 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:

a) 10 incorrect answer

b) 16 incorrect answer

Step-by-step explanation:

Let No. of incorrect answer marks be X

a) so, Radhika marks = correct marks - incorrect marks

Then, 10*5 + x =30

50 + x = 30

x = 30 -50 = -20

So, No. of incorrect answer = 10

b) Jay marks = correct marks - incorrect marks

Then, 10*4 + x = -12

40 + x = -12

x = -12 -40

x = -52

No of incorrect answer = 26