1. The probability of failure of a space shuttle primary computer system is 1.50 × 10-3 . This computer system has a secondary backup computer system with the same failure probability. What is the probability of simultaneous failure of both the primary and secondary computer systems?
2. An eight-cylinder engine has one bad spark plug. If the mechanic removes two spark plugs at random, what is the probability that the defective spark plug is found on the first try?
3. A single die is tossed. What is the probability that it will come up with a value greater than 4?