Denver, Engle and Fido are all dogs who eat differing amounts of dog food. Denver gets
8/19
of the dog food.
Engle and Fido share the rest of the food in the ratio 3 : 1
What is Fido's share of the dog food?
Show your answer as a percentage, rounded to the nearest percent if necessary.

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?