1. Math
  2. Statistics And Probability
  3. answer is b but please explain why...

Question: answer is b but please explain why...

Question details

19. In Saint Tropez, the probability that t rains is 10%. Given that it rains, the amount of rain has a density of f(x)(1/3)e-/3 Find the variance of the amount of rain on a given day. (A) .9 (C) 3.0 (D) 4.4 (E) 9.0

answer is B but please explain why

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