How to pronounce“gryffindors”in English

This gives us the expected percentage of people who are Gryffindors.

So we can calculate our expected frequencies by taking the total number of Gryffindors and dividing it by the total number of people:

Since there’s 479 People in our sample who don’t like pineapple, we expect 16.1% of them or about 77 of them to also be Gryffindors.