To calculate the experimental probability of rolling a 4 on the next toss, we first need to determine the total number of tosses Greg made and the number of times he rolled a 4.
From the table provided:
- Number of times he rolled a 4: 4
- Total number of tosses: \(7 + 5 + 6 + 4 + 8 + 6 = 36\)
The experimental probability \(P\) of rolling a 4 is given by the formula:
\[ P(4) = \frac{\text{Number of times 4 was rolled}}{\text{Total number of tosses}} = \frac{4}{36} \]
Now, we can simplify \(\frac{4}{36}\):
\[ \frac{4}{36} = \frac{1}{9} \]
Thus, the experimental probability of rolling a 4 on the next toss is:
\[ \frac{1}{9} \]
The correct answer is c. 1/9.