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JAMB Mathematics 2021 Objective — Question 16

Question 16 of 40 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2021 Objective paper, with the correct answer and a full explanation.

16. A boy mistakenly recorded the length of a 10cm rope as 9.5cm. The percentage error in his measurement is (a) 10% (b) 5% (c) 2.5% (D) 1.25%

A. 10%
B. 5%Correct
C. 2.5%
D. 1.25%

Explanation

% error = |actual - measured| / actual × 100% = |10 - 9.5| / 10 × 100% = 5%.

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