Tech4U is a technology chain that often offers really great deals on the newest devices. Over the last month, the corporate office has been tracking the number of new tablets sold at each Tech4U...

Extracted text: Tech4U is a technology chain that often offers really great deals on the newest devices. Over the last month, the corporate office has been tracking the number of new tablets sold at each Tech4U store. The histogram below summarizes the data. Use the histogram to answer each of the questions. Frequency (Number of stores) 10. 9 8 7 6 5- 4 2. 1 9 to 19 20 to 30 31 to 41 42 to 52 53 to 63 Number of tablets sold (a) How many stores sold from 20 to 30 tablets? (b) How many stores sold 31 or more tablets? (c) What is the class width?