Spelling errors in a text are either nonword errors or word errors. A nonword error produces a string of letters that is not a word, as when "the" is typed as "teh." Word errors produce the wrong word, as when "loose" is typed "lose." Nonword errors make up 25% of all errors. A human proofreader will catch 90% of all nonword errors and 70% of word errors.

a) what percent of all errors will the proofreader catch? Show your work.
b) Of all errors that the proofreader catches, what percent are nonword errors? Show your work.

Please help!!

Question

Spelling errors in a text are either nonword errors or word errors. A nonword error produces a string of letters that is not a word, as when "the" is typed as "teh." Word errors produce the wrong word, as when "loose" is typed "lose." Nonword errors make up 25% of all errors. A human proofreader will catch 90% of all nonword errors and 70% of word errors.

a) what percent of all errors will the proofreader catch? Show your work.
b) Of all errors that the proofreader catches, what percent are nonword errors? Show your work.

Please help!!