Question
The average speed of 20 vehicles during a survey was noted
as 60 km/h. Later it was observed that one speed was wrongly taken as 72 km/h instead of 62 km/h, and another was noted as 55 km/h instead of 65 km/h. What is the actual average speed?Solution
ATQ,
Correct average = {(20 × 60) – 72 – 55 + 62 + 65}/20
= {1200 – 127 + 127}/20
= 1200 / 20
= 60 km/h
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