1

Problem

In a class of 30 students, 18 of them passed the exam. Calculate the percentage of students who passed the exam.

2

Formula

\$"Percentage" = ("Value")/("Total value") \times 100\$

3

Step

To calculate the percentage of students who passed the exam, you can use the following formula:

→ \$"Percentage" = ("Number of students who passed")/("Total number of students") \times 100\$

4

Step

Given:

→ Number of students who passed the exam = 18

→ Total number of students = 30

5

Step

Substitute the values into the formula:

→ \$"Percentage" = (18)/(30) \times 100\$

6

Step

First, simplify the fraction:

→ \$(18)/(30)\$ = 0.6

7

Step

Then, multiply by 100 to find the percentage

→ \$0.6 \times 100 = 60%\$

8

Solution

Therefore, the percentage of students who passed the exam is 60%.

9

Sumup

Please summarize steps

Choices

10

Choice-A

This percentage implies that only 12 out of 30 students passed the exam, as shown by the \$(12)/(30) × 100\$ = 40%. This is incorrect based on the given data

Wrong 40%

11

Choice-B

This means exactly half of the students passed the exam. For 50%, 15 out of 30 students would need to pass. Since 18 students passed, this option is also incorrect

Wrong 50%

12

Choice-C

This is the correct percentage. Given that 18 out of 30 students passed, this matches our earlier calculation

Correct 60%

13

Choice-D

This option suggests that 70% of the students passed the exam. To check this, we would calculate \$(70 / 100)\$ ​\times 30], which equals 21 students. Since 18 students passed, this option is incorrect

Wrong 70%

14

Answer

Option

C

15

Sumup

Please summarize choices