Question

In a test 6 marks are given for every correct answer and -2 marks are given for every incorrect answer. Shyam answered all the questions and scored 40 marks though he got 10 correct answers. How many incorrect answers had he attempted?

Answer 1

Answer:

total marks gain by shyam=40

10 correct question marks=60

Step-by-step explanation:

let no of incorrect question =x

marks for inorrect question =(-2x)

(-2x)+60=40

after solving this equation

x=10

Answer 2

Answer:

marks given for correct answer = 6

marks given for incorrect answer = -2

Step-by-step explanation:

no of correct answer given by Shyam = 10

marks obtained by giving correct answer = 60

total marks secured = 40

total no of marks reduced by giving incorrect answer = 60 - 40 = 20

no of questions which answers where incorrect = 20/2

= 10

hence he gave 10 incorrect answer