Speed-distribution histogram and probability

Speed-distribution histogram and probability

Secondary 2

TGM Original Questions

Sixty vehicle speeds are grouped.

Speed \(x\) km/h	Frequency
\(40<x\le50\)	\(5\)
\(50<x\le60\)	\(11\)
\(60<x\le70\)	\(18\)
\(70<x\le80\)	\(13\)
\(80<x\le90\)	\(8\)
\(90<x\le100\)	\(5\)

Draw a histogram.
State the modal class.
Find the probability that a selected vehicle travels within a 70 km/h limit.

Solution:

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Answer:(a) frequency bars as table; (b) \(60<x\le70\); (c) \(17/30\).

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