11. Exercise Problem VI

A student noted the number of cars passing through a spot on a road for \(100\) periods each of \(3\) minutes and summarised it in the table given below. Find the mode of the data :

 

Number of cars	\(0-10\)	\(10-20\)	\(20-30\)	\(30-40\)	\(40-50\)	\(50-60\)	\(60-70\)	\(70-80\)
Frequency	\(7\)	\(14\)	\(13\)	\(12\)	\(20\)	\(11\)	\(15\)	\(8\)