Mathematics, 02.12.2020 14:00, ahmedeldyame

lavatory tests show that the lives of light bulbs are normally distributed with a mean of 750 hours and a stoandard devotion of 75 hours. Find the porbability that a randomly selected light bulb will last between 900 and 975 yours

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lavatory tests show that the lives of light bulbs are normally distributed with a mean of 750 hours...