To determine the percentage of farmers with sandy soil who prefer producing carrots, we can use the formula for relative frequency:
\[ \text{Relative frequency} = \frac{\text{Number of farmers preferring carrots with sandy soil}}{\text{Total number of farmers with sandy soil}} \times 100 \]
From the table:
- Number of farmers with sandy soil who prefer carrots = 120
- Total number of farmers with sandy soil = 170
Now, substituting those numbers into the formula:
\[ \text{Relative frequency} = \frac{120}{170} \times 100 \]
Calculating the fraction:
\[ \frac{120}{170} \approx 0.70588 \]
Now, convert this to a percentage:
\[ 0.70588 \times 100 \approx 70.588 \]
Rounding this to the nearest tenth gives:
\[ 70.6% \]
Thus, the percentage chance that farmers with sandy soil prefer to grow carrots is 70.6%.
The correct answer is:
70.6%