Question
The average age of a group of security guards and teachers is 33. If the average age of the security guards is 30 years and that of the teachers is 39 years, what is the ratio of the number of security guards to teachers?
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The average age of a group of security guards and teachers is 33. If the average age of the security guards is 30 years and that of the teachers is 39 years, what is the ratio of the number of security guards to teachers?