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the Oregon fisheries commission monitors the size of the salmon that climb the fish ladder at...

the Oregon fisheries commission monitors the size of the salmon that climb the fish ladder at Bonneville dam on the Columbia river every year. the commission described the length of the salmon observed during the past year with a normal distribution having a mean of 78cm and a standard deviation of 18cm. what percentage of the salmon were a. less than 50 cm in length?
b.between 70 cm and 100 cm in length? c.at least 95 cm in length? d. between 90 cm and 115 cm in length?

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