A brand of lightbulb has an average life of 500 hr, with a standard deviation of 40 hr. The length of life of the bulb can be closely approximated by a normal curve. A warehouse manager buys and installs​ 10,000 such bulbs. Find the total number that can be expected to last less than 608 hr. The total number of bulbs that can be expected to last less than 608 hr is?

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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A brand of lightbulb has an average life of 500 hr, with a standard deviation of 40 hr. The length of life of the bulb can be closely approximated by a normal curve. A warehouse manager buys and installs​ 10,000 such bulbs. Find the total number that can be expected to last less than 608 hr.

The total number of bulbs that can be expected to last less than 608 hr is?

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