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 2 of 14.
Sonam said:
1 decade ago
I like your method; saifz.
Akanksha said:
1 decade ago
Ramesh method is best.
Chitra said:
1 decade ago
Ramesh you done good job. I reall impressed way of answering. Thanks a lot.
Bharathi said:
1 decade ago
Ramesh they specified 20% not only 20. So how answer will come for below 8 years is 20.
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.
Anil kumar said:
1 decade ago
Sravanreddy your explaination was good.
Dinesh said:
1 decade ago
Saravanareddy method is best.
Madhavi said:
1 decade ago
Ramesh mehod is best.
Swathi said:
1 decade ago
Y cant tis be 150??
2/3 of x=48
x=72 is students at age 8
72+48=120 can be equated with 80%
remaining 20% must be added to this.
80%=120
20%=x
x=30
hence total=120+30=150 is total number of students...is tis right???
2/3 of x=48
x=72 is students at age 8
72+48=120 can be equated with 80%
remaining 20% must be added to this.
80%=120
20%=x
x=30
hence total=120+30=150 is total number of students...is tis right???
Chethana said:
1 decade ago
@Ramesh you explained well thanks.
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