Use the frequency table to find the probability of at most 4 responses received to this week's newspaper editorials.

B

Step-by-step explanation:

To get probability of AT MOST 4 responses means all the probabilities Equal to or Less Than 4.

From the table, that is probability of 0, 1, 2, 3 or 4. (OR in probability means adding)

Hence, we add the number of editorials for P=0,1,2,3, and 4 and then divide by total number of editorials.

Answer choice B is right.

a negative exponent is translated as follows:

so, we have