Question: From experience, Teton Tire knows the probability is .80 that their XB-70 will last 60,000 miles before it becomes bald or fails. An adjustment is

From experience, Teton Tire knows the probability is .80 that their XB-70 will last 60,000 miles before it becomes bald or fails. An adjustment is made on any tire that does not last 60,000 miles. You purchase four XB-70s. What is the probability all four tires will last at least 60,000 miles?

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