Dina has twice as many dolls as Ivy. 2/3 of Ivy's dolls are collectors editions. If Ivy has 20 collectors edition dolls, how many dolls does Dina have? Let's think first. Chain of thought:
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Ivy has 20 / 2 * 3 = 30 dolls. Dina has 30 * 2 = 60 dolls.
Therefore, the answer is 60.
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