A light bulb at art museum has expected life of 300 hours and standard deviation of 3 hours. Employ Chebychev's Inequality to estimate the probability that one of these light bulbs will last between 280 and 320 hours of use.
a) 0.8500
b) 0.9775
c) 0.0225
d) 0.1500
e) 0.9966