Ineed with a quick question. its posted below!

Triangle knm is what is true about the sides of knm

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?

If a suspect is in possession of 20 grams of cocaine how many ounces does he possess what will the charge be