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Mathematics, 19.01.2020 00:31 Admin

Acompany installs 5000 light bulbs, each with an average life of 500 hours, standard deviation of 100 hours, and distribution approximated by a normal curve. find the percentage of bulbs that can be expected to last the period of time. less than 690 hours. a. 97.06%. b. 47.14%. c. 97.1%. d. 97.2%

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