7. Boeing and related companies employ 12% of Seattle's labour force. a) If 10 Seattle workers are randomly selected, find the probability that at least one of them is employed by Boeing. Show...

Extracted text: 7. Boeing and related companies employ 12% of Seattle's labour force. a) If 10 Seattle workers are randomly selected, find the probability that at least one of them is employed by Boeing. Show detailed calculations by hand. b) If 1000 Seattle workers are randomly selected, find the probability that 100 or more are employed by Boeing. (You may use your calculator or a normal approximation)