Question 24

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Jambmaths question: 

If the mean of five consecutive numbers integer is 30. Find the largest of the number

Option A: 

30

Option B: 

28

Option C: 

34

Option D: 

32

Jamb Maths Solution: 

Let the number be $n,n+1,n+2,n+3,n+4$

$mean=\bar{x}=\frac{n+n+1+n+2+n+3+n+4}{5}$

$\frac{5n+10}{5}=30$

 $n+2=20$

 $n=28$

The largest number is n + 4 = 28 + 4 =32

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