What is the gear ratio?

Mary's manager told her she should insert a graphic into her documentwrite mary a brief note describing how to insert a graphicin a word processing document.

Assume that there is a 4% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on three independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?

Which text format is this, "the text is transcribed exactly as it sounds and includes all the utterances of the speakers. "?