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QUESTION
Two identical cameras, call them A and B, have their flashes fail 21% and 23% of the time respectively. A photographer selects a camera at random and...
Two identical cameras, call them A and B, have their flashes fail 21% and 23% of the time respectively. A photographer selects a camera at random and uses it to take 10 shots with the flash. What is the probability that the flash failed exactly twice?
