A) 55.2 km/h
B) 56.2 km/h
C) 57.2 km/h
D) 58.2 km/h
E) None of these
Correct Answer: B
Solution :
Explanation Mean speed using error instrument \[=\,\,\,\frac{47+53+49+60+39+42+57+55+48+52}{10}\]\[=\,\,\frac{502}{10}=50.2\,\,km/h\] Corrected mean speed \[=\,\,\frac{53+59+55+66+45+48+63+61+54+58}{10}\]\[=\frac{562}{10}=56.2\,\,km/h\]You need to login to perform this action.
You will be redirected in
3 sec