The table shows relative frequencies for red-green color blindness in one doctor's praction. m represents 'person is male' and c represents 'person is color-blind. use this table to find the probability p(m) m totals 0.048 0.004 0.062 0.451 0.497 0.948 c totals 0.499 0.501 1.000 p(m)- 2-

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?