In a production lot, $20\%$ of widgets are blue and the rest are black. One-half of widgets are made of silver and the

In a production lot, $20\%$ of widgets are blue and the rest are black. One-half of widgets are made of silver and the rest are made of gold. If $10\%$ of the widgets are silver and blue, and $80$ are black and gold, how many total widgets are there?

A. 140
B. 160
C. 180
D. 200
E. 250

Answer: D

Source: Veritas Prep

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