Question

please solve it i will mark you brainlist its urgent question 7 ​

Answer 1

Step-by-step explanation:

Given:

Marks for correct answers = 3

Marks for incorrect answers = -2

(i)

Total marks = 24.

Number of correct answers = 14.

Marks for correct answers = 14 * 3 = 42.

Total marks = correct answer + Marks for incorrect answers + Number of incorrect answers

⇒ 24 = 42 + (-2) + Number of incorrect answers

⇒ -18 = (-2) + Number of incorrect answers

⇒ 9 = Number of incorrect answers

∴ Questions he attempted incorrectly = 9.

(ii)

Total marks = -7.

Number of correct answers = 9

Marks for correct answers = 9 * 3 = 27.

Total marks = Correct answer + Marks for incorrect answer

⇒ -7 = 27 + (-2) * Number of incorrect answers

⇒ 34 = 2 * Number of incorrect answers

⇒ 17 = Number of incorrect answers

∴ Questions she attempted incorrectly = 17.

Hope it helps!