Discussion
If Red part in the following pie chart is 40, what is White part?
| Part | Share of the pie |
|---|---|
| Yellow | \( \frac{1}{4} \) |
| Blue | \( \frac{1}{8} \) |
| White | \( \frac{1}{8} \) |
| Red | \( \frac{1}{2} \) |
Answer: B
The White part is 10.
Red is \( \frac{1}{2} \) of the chart and equals 40, so the whole chart is 80. White is \( \frac{1}{8} \) of the chart:
\[ \text{White} = \frac{1}{8} \times 80 = 10 \]
As a check, Yellow is 20 and Blue is 10, and \( 40 + 20 + 10 + 10 = 80 \). 20 is the Yellow part, 5 would follow from taking 40 as the whole, and 12 has no basis.
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