Question

an employee at the craft store counted the number of red buttons in each bag of mixed buttons. red buttons per bag
stem leaf
5 3 8
6 0
7 5
8 4 5
9 1 3 5
10 5 7
11 1 4 8 8
12 0 1 1 1 1
how many bags had exactly 121 red buttons?

Explanation:

Step1: Understand stem - and - leaf plot

In a stem - and - leaf plot, the stem represents the tens digit and the leaf represents the units digit. For the row with stem 12, the values are formed by combining 12 (from the stem) with the digits in the leaf.

Step2: Count occurrences of 121

In the row with stem 12, the leaves are 0, 1, 1, 1, 1. Each leaf value combined with the stem gives a data - point. When the leaf is 1 and the stem is 12, the value is 121. Counting the number of 1s in the leaf for the stem 12, we find there are 4 such values.

Answer:

4