The amount of time a certain brand of light bulb lasts is normally distribued with a nean of 1900 hours and a standard deviation of 45 hours. Out of 670 freshly installed
ight bulbs in a new large building, how many would be expected to last more than
1890 hours, to the nearest whole number?

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Irvin2284

04.05.2023

Mathematics

Yesterday the bandits scored 56 points in their basketball game. today they scored 42 points. what is the percent decreasw of the bandits score from yesterday to today?

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The amount of time a certain brand of light bulb lasts is normally distribued with a nean of 1900 hours and a standard deviation of 45 hours. Out of 670 freshly installed ight bulbs in a new large building, how many would be expected to last more than 1890 hours, to the nearest whole number?