Question
If 20% of students earned an A on a test. If there were 30 students in the class, how many got an A.
- 3
- 6
- 9
- 12
Hint:
1. When a certain quantity is divided into 100 equal parts and a certain part of it is to be expressed in terms of the whole quantity, that portion is called as a percent, represented with a % sign.
2. Percentage of students scoring A grade = Number of students scoring A grade/ Total number of students * 100.
The correct answers are: 6, 9
Given-
Percentage of students scoring A grade = 20%
Total number of students = 30
To find-
Number of students scoring A grade
Solution-
We know that-
Percentage of students scoring A grade = Number of students scoring A grade/ Total number of students * 100.
∴ 20 = Number of students scoring A grade/ 30 * 100
∴ 20 * 30 / 100 = Number of students scoring A grade
∴ 6 = Number of students scoring A grade
Final Answer- Option 'b' i.e. '6' is the correct answer to the given question.
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