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What is the probability that the new email is spam

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A software to detect spam is designed by generally identifying the phrases that appear in spam emails. Suppose that 80% of the e-mail is spam. 10% of spam e-mails use the phrase "MONEY BONUS", even though this phrase is used in 1% of non-spam (non-spam) emails.

a. What is the probability that the new email is spam?

b. What is the probability that the new email is not spam?

Reference no: EM132844648

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