The probability of event A is 0.65, and the probability of event B is 0.76. The probability of both event A and event B occurring is 0.494. Are events A and B dependent or independent? In this scenario, events A and B are events.

The life (in hours) of a magnetic resonance imagining machine (mri) is modeled by a weibull distribution with parameters β = 2 and δ = 370 hours. (a) determine the mean life of the mri. (round your answer to 2 decimal ) determine the variance of the life of the mri. (round your answer to 1 decimal ) what is the probability that the mri fails before 250 hours? (round your answer to 4 decimal places.)