Question

A post office has three categories of letters: 60% are from businesses, 30% are individual mail, and the remaining 10% are government mail. 5% of the letters from businesses have address errors, 10% of the individual mail has address errors, while 1% of the government mail has address errors. If we receive a letter with an address error, what is the probability that it is individual mail?"

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Sigrid

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Ποσοστό κατανομής αλληλογραφίας με σφάλματα διεύθυνσης:
Β = 60% x 5% = 0,03
I = 30% x 10% = 0,03
G = 10% x 1% = 0,001
Σύνολο = 0,061
Απάντηση:
P(άτομο)= 0,03/0,061 = 49,18%

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