6. In San Diego, California, a sample of 444 businesses was surveyed to determine which overnight mailing services they used. The following information was determined. 189 used Federal Express 205 used United Parcel Service 122 used Airborne 57 used Federal Express and United Parcel Service 34 used Federal Express and Airborne 30 used United Parcel Services and Airborne 22 used all three How many used: a. None of these services? b. Only Airborne? c. Exactly one of the services? d. Exactly two of the services? e. Federal Express or United Parcel Services?

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