Given: A histogram representing the number of countries on the x-axis and the number of gold medals won on the y-axis.
Required: To determine the class width, how many countries won 7 or more gold medals, and how many won from 3 to 6 gold medals.
Explanation: The class width is the difference between the upper-class and lower-class limits. Hence, the class width for the given histogram is-(represented by the second, third, and fourth bar on the histogram)
[tex]6-3=3[/tex]Now, the number of countries that won 7 or more gold medals,
[tex]4+7+5=16[/tex]Similarly, the number of countries that 3 to 6 gold medals=6 (Represented by the first bar on the histogram).
Final Answer: a) 3
b) 16
c) 6
