Question

In class test 5 marks are given for every correct answer and (-2) marks are given for every incorrect answer. Sam answered all the questions and scored 30 marks.If he gave wrong answers for 10 questions than how many correct answers had he attempted? please full explanation​

Answer 1

Answer:

Marks obtained by Sam = 30

answers he had attempted incorrectly = 10

Marks obtained for incorrect answers = 10 x (-2)

= -20

Let the marks obtained by Sam for correct answers be x

so, x +(-20) = 30

x - 20 = 30

x = 30 + 20

x = 50

Marks given for each correct answers = 5

No of correct answers he had attempted = 50/5

= 10

hope it helps

Answer 2

Answer:

Sam gets 30 correct of 5 marks and gets = 30×5=150 marks.

Sam gets 10 incorrect of -2 marks and gets= 10×(-2)=-20.

Som Sam gets total = 150+(-20)= 150-20=130 marks.(ans)

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