4. Three mark exercise problems

In a village, there are \(570\) people who have cell phones. An NGO survey their cell phone usage. Based on this survey a histogram is drawn. Answer the following questions.

 

 

1. How many people use the cell phone for less than \(3\) hours?

 

2. How many of them use the cell phone for more than \(5\) hours?

 

3. Are people using cell phone for less than \(1\) hour? YesNo