WAEC - Mathematics (1989 - No. 11)
Instead of recording the number 1.23cm of the radius of a tube, a student recorded 1.32cm. Find the percentage of error, correct to one decimal place.
6.8%
7.3%
9.6%
14.4%
15.4%
ব্যাখ্যা
% error =
errorexact
x 1001
=
0.091.23
x 1001
= 7.3%