Find percentage of bulbs that is expected to last for hours

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Reference no: EM13141690

5000 light bulbs each with an average life of 500 hours, standard deviation is 100 hours. Find the percentage of bulbs that can be expected to last between 540 hours and 780 hours.

Reference no: EM13141690

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Find percentage of bulbs that is expected to last for hours : 5000 light bulbs each with an average life of 500 hours, standard deviation is 100 hours. Find the percentage of bulbs that can be expected to last between 540 hours and 780 hours.

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