Mathematics

Alana Patrick

2 June, 01:57

Because of the increasing nuisance of spam e-mail messages, many start-up companies have emerged to develop e-mail filters. One such filter was recently advertised as being 95% accurate. This could mean one of four things.

(a) 95% of the email allowed through is valid,

(b) 95% of spam is blocked,

(c) of the blocked e-mail is spam, or

(d) 95% of valid e-mail is allowed through