The future lifetimes (in months) of two components of a machine have the following joint density function: (A) (B) (C) Determine which of the following represents the probability that both components are still functioning 20 months from now. (D) (E) f(x,y)=125,000 0, 6 125,000 6 125,000 6 125,000 50-x 20 50- 6 20 30 50-x-y (50-x-y), 0

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