El papá de Xavier necesita 64 baldosas de 22 cm2 para cubrir el patio trasero de la casa, pero en la ferretería solo existen baldosas de 16 cm2. ¿Cuántas baldosas necesita? Ayudenme doy coronita PORFA

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?