Question 7

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waecmaths question: 

A sales boy gave a change of N68 instead of N72. Calculate his percentage error.

Option A: 

4%

Option B: 

$5\tfrac{5}{9}$%

Option C: 

$5\tfrac{15}{17}$%

Option D: 

7%

waecmaths solution: 

Error in the change given = N72 – N68 =N4$\text{Percentage }error=\frac{4}{72}\times 100=\frac{50}{9}=5\tfrac{5}{9}$

maths year: