Question 42

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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