Here’s the link of the exercise.

I had to solve it after viewing the solution, but I still don’t understand what the question is asking me to do.

Look at the histogram to the right. How many values in the data set are equal to either 5 or 6?

I’m not sure what are the “either 5 or 6”. Are they the number of samples? In that case, the answer should be 1 instead of 7.