To find the experimental probability of sunflower seeds germinating, you can use the following formula:
\[ \text{Experimental Probability} = \frac{\text{Number of Successful Outcomes}}{\text{Total Number of Trials}} \]
In this case, the number of successful outcomes (germinated seeds) is 30, and the total number of trials (seeds sown) is 40.
So the probability of a seed germinating is:
\[ \frac{30}{40} = \frac{3}{4} \]
Now, if you sow 20 seeds, you can approximate the expected number of seeds that will germinate by multiplying the experimental probability by the number of seeds sown:
\[ \text{Expected Germination} = \text{Probability} \times \text{Number of Seeds Sown} = \frac{3}{4} \times 20 = 15 \]
Therefore, if you sow 20 seeds, approximately 15 seeds are expected to germinate.
The correct response is:
15