Question 38

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Jambmaths question: 

Age

1

2

3

4

5

6

7

No of Child

6

x

16

2x – 1

15

12

18

The distribution above shows the ages of 120 children. Find the value of x

Option A: 

22

Option B: 

20

Option C: 

18

Option D: 

16

Jamb Maths Solution: 

$\begin{align}  & 120=6+x+16+2x-1+15+12+18 \\ & 120=3x+66 \\ & 3x=54 \\ & x=18 \\\end{align}$

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