Based on the information, 2100 books were sold in 3 weeks.
The table mentions a rate of 700 books per 3 weeks. This means that for every 3 weeks, 700 books are sold. The rate provides the relationship between the number of books sold and the time period. Multiplying this rate by the number of weeks gives us the total number of books sold in that specific duration.
The rate of books sold is 700 books per 3 weeks. To find the total number of books sold in 3 weeks, you can multiply the rate by the number of weeks:
Total Books Sold = 700 * 3
= 2100
Therefore, 2100 books were sold in 3 weeks.