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Question

A person recorded the speed (in km/hr) of 10 motorists as 48, 52, 57, 55, 45, 39, 61, 49, 51 and 43. The average speed of the motorists is


A
57 km/hr
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B

50 km/hr

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C

55 km/hr

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D

54 km/hr

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Solution

The correct option is B

50 km/hr


The speeds are 48, 52, 57, 55, 45, 39, 61, 49, 51 and 43 (in km/hr)
Sum of the speeds
=48+52+57+55+45+39+61+49+51+43=500
Number of speeds taken into account = 10

Average =50010=50 km/hr


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