Mathematics, 19.01.2020 17:31, dennismathews01

Insurance companies a and b each earn an annual profit that is normally distributed with the same positive mean. the standard deviation of company a's annual profit is one half of its mean. in a given year, the probability that company b has a loss (negative profit) is 0.9 times the probability that company a has a loss. calculate the ratio of the standard deviation of company b's annual profit to the standard deviation of company a's annual profit.

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Insurance companies a and b each earn an annual profit that is normally distributed with the same po...