A person recorded the speed (in km/hr) of six motorists as 40, 50, 53, 55, 45 and 47. What is the average speed of these six motorists?

50km/h

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48.33km/h

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47.5km/h

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45.5km/h

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Solution

The correct option is B
48.33km/h

The speeds are 40, 50, 53, 55, 45 and 47 (in km/hr)
Sum of the speeds
$= 40 + 50 + 53 + 55 + 45 + 47 = 290$
Number of speeds taken into account = 6
$∴ Average = \frac{290}{6} = 48.33 k m / h r$

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A person recorded the speed (in km/hr) of six motorists as 40, 50, 53, 55, 45 and 47. What is the average speed of these six motorists?

The correct option is B 48.33km/h The speeds are 40, 50, 53, 55, 45 and 47 (in km/hr) Sum of the speeds =40+50+53+55+45+47=290 Number of speeds taken into account = 6 ∴Average =2906=48.33 km/hr

The correct option is B
48.33km/h

The speeds are 40, 50, 53, 55, 45 and 47 (in km/hr)
Sum of the speeds
$= 40 + 50 + 53 + 55 + 45 + 47 = 290$
Number of speeds taken into account = 6
$∴ Average = \frac{290}{6} = 48.33 k m / h r$