Acoin, having probability p of landing heads, is continually flipped until at least one head and one tail have been flipped. (a) find the expected number of flips needed. (b) find the expected number of flips that land on heads. (c) find the expected number of flips that land on tails.

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.)