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NTSE Stage 2 MAT 2019 Exam Question Paper
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© examsnet.com
Question : 66
Total: 100
In a class 20% of students are below 14 years of age. Out of the remaining students 10% are of die age 14 - 15 years and ratio of students who are between 15-16 years of age to student above 16 years of age is 3 : 2. If the number of students who are above 16 years is 72, what is the total number of students in the class?
200
250
300
400
Validate
Solution:
Let total no. of student = x
Students below 14 years = 20% of
x
=
20
x
100
=
x
5
Students between 14-15 years = 10% of
4
x
5
=
10
100
×
4
x
5
=
8
x
100
=
2
x
25
Students
(
15
−
16
)
Students
(
>
16
)
=
3
2
Now, student (>16) = 72
∴ Students (15-16) = 108 (Given)
∴
x
5
+
2
x
25
+
72
+
108
=
x
∴
x
=
250
© examsnet.com
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