1)Typographical and spelling errors can be either "nonword errors" or "word errors." A nonword error is not a real word, as when "the" is typed as "teh." A word error is a real word, but not the right word, as when "lose" is typed as "loose." Nonword errors make up 25% of all errors. A human proofreader will catch 90% of nonword errors and 70% of word errors. What percent of all errors will the proofreader catch? Give your answer in % without decimal places. Fill in the blank: The percent of the errors the proofreader will catch is: _______ %.
0.90*0.25+0.70*0.75
please explain
where did you get the 75% from
catching 90% of the 25% nonword errors gives us 0.90*0.25 of all errors The word errors make up the remaining 75% of errors, and catching 70% of them gives us 0.70*0.75
Since theres only the two kinds of errors, they have to make up 100% of all errors. 100-25=75% for the word errors
ok
so the answer is 75%
thank you for your help
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