A survey of 400 small businesses indicates that 320 own photocopiers, 105 own fa machines, and 90 own photocopiers and fax machines. Hint: draw a Venn diagram or make a table. (a) How many businesses in the survey own either a photocopier or a fax machine? (b) How many own neither a photocopier nor a fax machine? (c) How many own a fax machine and do not own a photocopier?

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