Multiple Choice
Light bulbs are normally distributed with an average lifetime of 1000 hours and a standard deviation of 250 hours. The probability that a light bulb picked at random will last less than 1500 hours is about:
A) 97.72 percent.
B) 95.44 percent.
C) 75.00 percent.
D) 68.00 percent.
Correct Answer:
Verified
Correct Answer:
Verified
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