The distribution of lifetimes for a certain type of light, Ask an Expert

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The distribution of lifetimes for a certain type of light bulb is normally distributed with a mean of 1000 hours and a standard deviation of 100 hours. Find the 33rd percentile of the distribution of lifetimes.

A. 560
B. 330
C. 1044
D. 1440
A. none of these

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