Based on the number of packs bought and the number of ribbons in each pack, Maria will have a total of 3r ribbons.
Each pack has r ribbons and Maria wants to buy 3 of such packs.
The number of ribbons Maria will have is:
= Number of packs bought x Number of ribbons in pack
= 3 x r
= 3r
In conclusion, Maria will have 3r ribbons.
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