In a class of students, the following data table summarizes how many students have a cat or a dog. What is the probability that a student chosen randomly from the class has a dog?

To find the probability that a student chosen randomly from the class has a dog, we need to consider the number of students that have a dog compared to the total number of students.

In this case, there are 6 students that have cats and dogs, and 7 students that only have dogs. Therefore, there are a total of 6 + 7 = 13 students that have dogs.

The total number of students in the class is the sum of all the entries in the table, which is 6 + 7 + 11 + 3 = 27.

Therefore, the probability that a student chosen randomly from the class has a dog is:

P(student has a dog) = Number of students with a dog / Total number of students
P(student has a dog) = 13 / 27
P(student has a dog) = 0.481 or 48.1%

Therefore, the probability that a student chosen randomly from the class has a dog is 48.1%.