A sales boy gave a change of N68 instead of N72. Calculate his percentage error...
MATHEMATICS
WAEC 2013
A sales boy gave a change of N68 instead of N72. Calculate his percentage error
- A. 4%
- B. 5\(\frac{5}{9}\)%
- C. 5\(\frac{15}{17}\)%
- D. 7%
Correct Answer: B. 5\(\frac{5}{9}\)%
Explanation
% error = \(\frac{error}{\text{actual value}} \times 100\)
error = N72 - N68 = 4
actual value = N72
%error = \(\frac{4}{72} \times 100\)
= \(\frac{100}{18} = \frac{50}{9}\) = 5\(\frac{5}{9}\)%
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