In January 2025
Answer to Question #194838 in Statistics and Probability for Narendra
An electrical power supply is used to charge batteries of cell-phones. This power supply is capable to maintain the mean output current 3 A with its variance 0.3A². An average cell-phone consumes a charging current of 300 mA. The cell-phones charging currents show standard deviation 30 mA. How many cell-phones would have to be connected to the power supply for the probability of its structural damage to exceed 3 percent?
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