Aptitude - Percentage - Discussion
Discussion Forum : Percentage - General Questions (Q.No. 7)
7.
In a certain school, 20% of students are below 8 years of age. The number of students above 8 years of age is 
of the number of students of 8 years of age which is 48. What is the total number of students in the school?
Answer: Option
Explanation:
Let the number of students be x. Then,
Number of students above 8 years of age = (100 - 20)% of x = 80% of x.
 80% of x = 48 + |
2 | of 48 |
| 3 |
 |
80 | x = 80 |
| 100 |
x = 100.
Video Explanation: https://youtu.be/yPfocU6DA2M
Discussion:
135 comments Page 8 of 14.
Parineetha said:
7 years ago
Total number of students = no of students below 8 years+no of students above 8 years. i.e x =48+ 2/3 of 48 = 80.
Shubham said:
1 decade ago
I think answer should be 120 because they asked total no of student not only students which are above 8years.
Santosh shah said:
8 years ago
Below 8 year= 20,
Exact 8 year= 48,
Above 8 year = 2/3 * 48 = 32.
So, total students=100.
Exact 8 year= 48,
Above 8 year = 2/3 * 48 = 32.
So, total students=100.
Harish said:
6 years ago
20% is below 8 years.
Then 80% is above 8 and at the age of 8,
80%=48+(2/3 * 48),
80%=80,
Then 100%=100.
Then 80% is above 8 and at the age of 8,
80%=48+(2/3 * 48),
80%=80,
Then 100%=100.
Rupali said:
1 decade ago
Below 8 + equal to 8 + above 8 = total.
20%x + 48 + 2/3*48 = x.
80x = 8000.
x = 100. ANSWER.
20%x + 48 + 2/3*48 = x.
80x = 8000.
x = 100. ANSWER.
Praveen said:
8 years ago
Please slove.
40%of a number is more the 20% of 650 by 190 find the number with explanation.
40%of a number is more the 20% of 650 by 190 find the number with explanation.
Karthik swathi said:
1 decade ago
Here asking the total no.of students, then why u equal to the 80% (which is above 8 year).
Jiya said:
5 years ago
Below 8 years = 20.
Exact 8 years = 48.
Above 8 years = 2/3*48 = 32.
Now add 48+32+20=100.
Exact 8 years = 48.
Above 8 years = 2/3*48 = 32.
Now add 48+32+20=100.
Bharathi said:
1 decade ago
Ramesh they specified 20% not only 20. So how answer will come for below 8 years is 20.
Ramesh said:
9 years ago
It clearly indicates that 80% of students is 100 but 100% is 120 must be the answer.
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