To find the proportion of rocky-soil farmers who choose to produce peppers, we can use the data provided in the table.
From the data:
- Total rocky soil farmers = 250
- Rocky soil farmers who produce peppers = 150
Now, we can calculate the relative frequency (proportion) of rocky soil farmers who produce peppers:
\[ \text{Relative frequency} = \frac{\text{Number of rocky soil farmers growing peppers}}{\text{Total number of rocky soil farmers}} = \frac{150}{250} \]
Calculating this gives:
\[ \frac{150}{250} = 0.6 \]
To convert this to a percentage, we multiply by 100:
\[ 0.6 \times 100 = 60.0% \]
Thus, the percentage chance that farmers with rocky soil prefer growing peppers is 60.0%.
So the correct answer is:
- 60.0%