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1. The lifespan of a particular species of turtle is normally distributed with a mean of 180 years and standard deviation of 40 years. What

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1. The lifespan of a particular species of turtle is normally distributed with a mean of 180 years and standard deviation of 40 years. What proportion of these turtles will live to be more than 220 years old? [3marks] A company makes 2 x 4 boards that are used in construction projects. The board lengths produced by this company are uniformly distributed from 8 it to 14 ft. Determine the probability that a board selected at random will be less than 10 ft long. [2 marks]

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