Binomial distribution with n trials and success rate
Suppose N has a binomial distribution with n trials and success rate p, while X has binomial distribution with N trials and success rate r. What is the unconditional probability P(X=0)?
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How big a tank do you need to store enough oil to heat your home for a week? The energy content of the oil is 46.2MJ/kg and its density is 0.85g/cm3?
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