1
Question
In a classroom, the ratio of the number of students who like maths to the number of students who like science is 2:5. If the number of students who like science is 20, then find the total number of students.
In a classroom, the ratio of the number of students who like maths to the number of students who like science is 2:5. If the number of students who like science is 20, then find the total number of students.
Open in App
Solution
The correct option is C 28
Given, the ratio of the number of students who like maths to the number of students who like science = 2 : 5.
The number of students who like science is 20. We know that,
5×4=20
When we multiply 4 with 5, we get 20.
Hence, the multiplier is 4.
So, the number of students who like maths will be
2×4=8
The number of students who like maths = 8.
The total number of students = 8 + 20 = 28.
Items in the Ratio
Numbers in the Ratio
Actual Value
Multiplier
Students who like Maths
2
8
4
Students who like Science
5
20
4
Total
7
28
Given, the ratio of the number of students who like maths to the number of students who like science = 2 : 5.
The number of students who like science is 20. We know that,
5×4=20
When we multiply 4 with 5, we get 20.
Hence, the multiplier is 4.
So, the number of students who like maths will be
2×4=8
The number of students who like maths = 8.
The total number of students = 8 + 20 = 28.
| Items in the Ratio | Numbers in the Ratio | Actual Value | Multiplier |
| Students who like Maths | 2 | 8 | 4 |
| Students who like Science | 5 | 20 | 4 |
| Total | 7 | 28 |
Suggest Corrections
0
Similar questions
View More
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
