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The problem in the image asks:

**Question:**
"There are five different books and four different pens sitting on a table. One of each is selected. Should you use the rule of sum or the product rule to count the number of possible selections? Explain your reasoning."

**Solution:**
- The **rule of sum** is used when you are making choices from **one set or

There are five different books and four different pens sitting on a table. One of each is selected. Should you use the rule of sum or the product rule to count the number of possible selections? Explain your reasoning.

Learn how to apply the product rule for counting in combinatorics. This problem involves selecting one book out of five and one pen out of four, using the multiplication principle to calculate the total number of possible selections. Suitable for students in Grades 6-8.

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