The life expectancy (in years) of a certain type of computer chip is a continuous random variable with the following probability density function. Find the probability that a randomly selected chip will last from three to seven years. Round the answer to two decimal places as needed. 4 x20 f(x) = (x + 4)? 0 otherwise A. 0.57 B. 0.21 O C. 0.33 D. 0.36

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