Typographical and spelling errors can be classified as "non-word" errors or "word errors." Non-word errors would be caught by a spell-checker -- for instance, using "teh" instead of "the." Word errors will not be caught by a spell-checker -- for instance, using "there" instead of "their." An English instructor has her class write an essay of 250 words and counts the number of word errors in each, yielding the following probability distribution:

What is the expected number of word errors, for a randomly chosen 250-word essay?

4

2

3

2.3

3.2