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A bank found that 25% of its loans to new small businesses become delinquent. If 500 small businesses are selected randomly from the bank's files,

A bank found that 25% of its loans to new small businesses become delinquent. If 500 small businesses are selected randomly from the bank's files, what is the probability that at least 130 of them are delinquent? Compare the result from the normal approximation with that from a calculation using the binomial distribution. Explain whether the difference between the two results is significant

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