Question

the librarian at the public library counted the number of books on each shelf. books per shelf
stem | leaf
1 | 8
2 | 2 3 4 5 9
3 |
4 | 9
5 |
6 | 3 6
7 |
8 | 1
how many shelves have at least 50 books?

Explanation:

Step1: Understand the stem - and - leaf plot

The stem - and - leaf plot represents data. The stem is the tens digit and the leaf is the units digit. For example, for stem 1 and leaf 8, the number is 18.

Step2: Identify the number of books on each shelf

The data points from the stem - and - leaf plot are: 18, 22, 23, 24, 25, 29, 39, 76, 81.

Step3: Count shelves with at least 50 books

We check each number. The numbers 76 and 81 are at least 50.

Answer:

2