Published by:
CGP EDU Academic Team
Published on: August 14, 2026
A study of automobile speeds on a highway yielded the following data for a 1 hour period-
Speed in km/hr Number of cars (n)
(i) 40 10
(ii) 45 8
(iii) 50 15
(iv) 55 10
(v) 60 12
Which of the following is/are correct-
A
The most probable speed of the automobile is 50 km/hr
B
The root mean square speed 51 km/hr
C
The value of 
is not equal to 
is not equal to
D
All of the above are correct
Text Solution
Verified by ExpertsThe correct answer is:
D
U rms =
U rms = 
U rms = 51.01 kms/hr.
U avg = 
U avg = 50.54 kms/hr.
∴ 
≠ 
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