Tim would like to reference a quick visual to determine which supplies his clinic spent the most money on during the month of January. Which of the
following tools should Tim use?
A. Bar graph
B. Line graph
C. Pie chart
D. Anatomical chart

Assume that there is a 11% 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 four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?