Question

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In a test (+5) marks are given for every correct answer and (-3) marks for every wrong answer. Ginni answered all the questions and scored 60 marks. 15 of Ginni's answers

were correct. How many of the questions she attempted were wrong?


.

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Answer 1

Answer:

15(5)-3(X)=60

75-3x=60

3x=75-60

3x=15

X=5

no.of questions attempted wrongly are 5

Answer 2

Answer:

She attempted 5 questions wrong.

Step-by-step explanation:

Given :

Marks are given for every correct answer = (+ 5)

Marks for every wrong answer = ( -3)

Ginni answered all the questions

Marks obtained by Ginni = 60 marks

Ginni had 15 correct answers

To find :

The questions she attempted were wrong

Solution :

Let,

The questions she attempted were wrong = x

Correct answers = 15

Mark secured = 15 × (5) = 75

Obtained Mark = 60

★ According to the Question :

⇒ 15 (5) + x (-3) = 60

⇒ 75 - 3x = 60

⇒ - 3x = 60 - 75

⇒ - 3x = - 15

⇒ 3x = 15

⇒ x = 15 / 3

⇒ x = 5

She attempted questions wrong = 5

Therefore, She attempted 5 questions wrong.