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Probability of getting someone

In a poll, respondents were asked whether they had ever been in a car accident. 471 respondents indicated that they had been in a car accident and 420 respondents said that they had not been in a car accident. If one of these respondents is randomly selected, what is the probability of getting someone who has been in a car accident? Round to the nearest thousandth, if necessary.

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## Q : Average tax refund

According to the IRS, the average tax refund for the 70 million personal income tax returns in 1998 was $800. Assuming a standard deviation of $220, find the probability that for a random sample of 49 returns, the mean refund is between $700 and $