Question

in a test +5 marks are given for every correct answer and -2 marks are given for every incorrect answers.
1)rohan answered all questions and scored 24 marks though he got 8 correct answer.
2) smitha answered all questions and scored (-15) marks though he got 3 correct answers.how many incorrect answers had they attempted.​

Answer 1

Answer:

let we will do it as point a and point b

Step-by-step explanation:

a) rohan get Marks =24

correct answer =8

every question is of +5 marks so 8×5=40

incorrect answer is of -2

marks of incorrect 40-24 =16

so no of incorrect =16/-2 =8

he got 8 correct and 8 incorrect marks

b) smitha got marks= -15

correct answer =3

every question is of +5 marks so 3×5= 15

incorrect answer is of -2

marks of incorrect 15-(-15)=15+15=30

so no of incorrect marks =30/2 = 15