Jambmaths question:
|
Interval(Years) |
10–12 |
13–15 |
16–18 |
19– 20 |
21–23 |
|
No of Pupils |
6 |
14 |
15 |
10 |
32 |
The table above shows the frequency distribution of ages (in years) of pupils in a certain secondary, what percentage of the total number of pupils is over 15 but less than 21 years
Option A:
35%
Option B:
45%
Option C:
50%
Option D:
6%
Jamb Maths Solution:
Total number of students = 6 + 14 + 15 + 10 + 5 =50
Number of students over 15 years old but less than 21 years old = 15 + 10 =25
$\text{Percentage of }15<x<21=\frac{25}{50}\times 100=50percent$
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