Question

STEP BY STEP EXPLANATION PLEASE.

a class test containing 15 questions, 4 marks are given for every correct answer and (-2) marks are given for every incorrect answer. (i) Gurpreet attempts all questions but only 9 of her answers are correct. What is her total score ? (ii) One of her friend gets only 5 answers correct and the rest were wrong. What will be her score?​

Answer 1

Given :

• Total questions = 15
• Marks given for every correct answer = 4 marks.
• Marks given for every incorrect answer = (-2) marks.

To Find :

• Total score of Gurpreet
• Total score of Grupreet 's friend

Solution :

In Case of Gurpreet :

$\qquad$ ★ Total questions attempted by Gurpreet is 15 questions and total correct answers are 9 answers.

Marks of her 9 correct answers :-

$\qquad$ = 9 × 4

$\qquad$=36 Marks

It's given, total incorrect answers are 6

Marks of her 6 incorrect answers :-

$\qquad$ = 6 × (-2)

$\qquad$= -12 Marks

$\qquad$★ Total marks = Marks of her 9 correct answers + Marks of her 6 incorrect answers

$\qquad$❏Total marks of Gurpreet

$\qquad$= 36 + (-12)

$\qquad$= 36 - 12

$\qquad$= 24 marks

• Hence, total score of Gurpreet is 24 marks.

In Case of Gurpreet's friend :-

$\qquad$★ Total question attempted bynGurpreet's friend is 5 questions.Since all the questions attempted by Gurpreet's friend are correct, so she would not get marks for incorrect answers.

$\qquad$❏ Total marks of Gurpreet's friend :-

$\qquad$= 5 × 4

$\qquad$= 20 marks

• Hence, total score of Gurpreet's friend :- is 20 marks.