Marnie bought 50 x 5 = <<50*5=250>>250 beads from the 5 bags of 50 beads.
She also bought 100 x 2 = <<100*2=200>>200 beads from the 2 bags of 100 beads.
She has a total of 250 + 200 = <<250+200=450>>450 beads.
Hence, she will be able to make 450/50 = <<450/50=9>>9 bracelets.
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