Jane pulled weeds in the garden 7 times. she was paid $5 each time she pulled weeds for less than 1 hr and $6 each time she pulled weeds for more than 1 hr. if jane received $39, how many times did she pull weeds for more than 1 hr? neil

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?