Question

In a test (+5) marks are given for every correct answer and (-2) marks given for
incorrect answers.(1) Raj answered all the questions and scored 30 marks though
he got 10 correct answers.(2) Reshmi answered all the questions and scored (-12)
marks though she got 4 correct answers.How many incorrect had they attempted?

Answer 1

Answer:

heya mate here is your answer...

Step-by-step explanation:

Let xx be the number of incorrect answers she got. She got 10 correct answers.

5∗10+(−2)∗x=305∗10+(−2)∗x=30

50−2x=3050−2x=30

−2x=30−50=−20−2x=30−50=−20

x=−20−2=10x=−20−2=10

Hence number of incorrect answers is 10.

hope it helps uh....

Answer 2

Answer:

1)total marks:30

Correct ans=10

Marks for correct ans=10*5=50

Marks for incorrect ans =30-50=-20

No of incorrect ans=-20 divided by - 2=10

10 incorrect answers

2)correct ans=4

Marks for correct and=5*4=20

Total marks=-12

Marks for incorrect ans=-12-20=-32

No of incorrect ans=-32 divided by - 2 =16

She got 16 incorrect ans