In a test (+5) marks are given for each correct answer, (-1) marks for

1.	In a test (+5) marks are given for each correct answer, (-1) marks for each wrong answer and 0 marks for questions not attempted. The student attempts 7 questions right, some questions wrong and rest not answered. If the total marks scored by a student is 30 and the total number of questions is 15, find the no of questions not attempted by the student.1. 32. 53. 24. 7
Answer» Correct Answer - Option 1 : 3 Given : Marks awarded for correct answer = +5 Marks awarded for incorrect answer = -1 Marks awarded for questions not answered = 0 No. of right questions = 7 Total marks he got = 30 Total no. Of questions = 15 Calculations: Let the number of wrongly attempted questions be x According to the question; 7 × (5) + (x) × (-1) = 30 ⇒ x = 5 Now , total question are 15 Que. Answered right + Que. Answered wrong + Que. not answered = 15 ⇒ 7 + 5 + Que. not answered = 15 ⇒ Questions not answered = 3 ∴ The no of questions not attempted by the student is 3.

In a test (+5) marks are given for each correct answer, (-1) marks for each wrong answer and 0 marks for questions not attempted. The student attempts 7 questions right, some questions wrong and rest not answered. If the total marks scored by a student is 30 and the total number of questions is 15, find the no of questions not attempted by the student.1. 32. 53. 24. 7

Answer» Correct Answer - Option 1 : 3

Given :

Marks awarded for correct answer = +5

Marks awarded for incorrect answer = -1

Marks awarded for questions not answered = 0

No. of right questions = 7

Total marks he got = 30

Total no. Of questions = 15

Calculations:

Let the number of wrongly attempted questions be x

According to the question;

7 × (5) + (x) × (-1) = 30

⇒ x = 5

Now , total question are 15

Que. Answered right + Que. Answered wrong + Que. not answered = 15

⇒ 7 + 5 + Que. not answered = 15

⇒ Questions not answered = 3

∴ The no of questions not attempted by the student is 3.