What’s the median of the data represented by this chart?

We might be able to make an estimate, but is it possible to know the exact value without access to the data? We’re taught to calculate the median of a data set by working with the actual data — order the values from least to greatest, and then find the middle value. Can we imitate this procedure when data is presented in a **histogram**, the type of chart shown above?

For a look at how the histogram is made, keep reading. Otherwise, jump straight to today’s challenge.