Recent Research Shows That The Total Number Of Time Measured In Hours That A Teenage Spends On Social Media Over A Per 1 (9.94 KiB) Viewed 417 times
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Recent research shows that the total number of time, measured in hours, that a teenage spends on social media over a period of one week is a random variable X having the density function shown to the right. Find the variance of X. (4)« (x-9), 9
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