Use the stem-and-leaf plot to answer the question: How many days show sales of less than 70 cups?

Cups of coffee sold at a coffee vending machine outlet in two weeks are as follows:

\begin{tabular}{c|lllllll}
Stem & \multicolumn{5}{|c}{Leaf} \\
& \\
\hline
5 & 0 & 2 & 8 & 9 & & \\
6 & 0 & 3 & 3 & 5 & 9 & 9
\end{tabular}



Answer :

Certainly! Let's use the provided stem and leaf plot to determine how many days had cup sales of less than 70.

First, let's interpret the stem and leaf plot. The stem represents the tens digit, while the leaf represents the units digit.

For the stems:
- 5: In the "5" row, the leaves are 0, 2, 8, 9, which corresponds to the numbers 50, 52, 58, and 59.
- 6: In the "6" row, the leaves are 0, 3, 3, 5, 9, 9, which corresponds to the numbers 60, 63, 63, 65, 69, and 69.

Now, list all the numbers that were sold:
- From the "5" stem: 50, 52, 58, 59
- From the "6" stem: 60, 63, 63, 65, 69, 69

Now, let's count the days when less than 70 cups were sold:
- 50 is less than 70
- 52 is less than 70
- 58 is less than 70
- 59 is less than 70
- 60 is less than 70
- 63 is less than 70
- 63 is less than 70
- 65 is less than 70
- 69 is less than 70
- 69 is less than 70

Each of these counts as one day. In total, there are 10 days when sales were less than 70 cups.

So, the answer is: There are 10 days when sales were less than 70 cups.