Question

A court reporter operates an electronic typewriter at 60 words per minute and a word processor at 70 words per minute. When using a typewriter, the reporter makes errors in 2% of the words, and when using a word processor, the reporter makes errors in 1%. What is the difference in number of errors made per hour on the two machines?

Answer 1

Typewriter = 60 * 60 * .02 = errors
Word Processor = 70 * 60 * .01 = errors
Subtract one from the other.