According to an nrf survey conducted by bigresearch, the average family spends about $237 on electronics (computers, cell phones, etc.) in back-to-college spending per student. suppose back-to-college family spending on electronics is normally distributed with a standard deviation of $54. if a family of a returning college student is randomly selected, what is the probability that: (a) they spend less than $155 on back-to-college electronics? (b) they spend more than $340 on back-to-college electronics? (c) they spend between $115 and $190 on back-to-college electronics?
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