Question : The following table shows the number of chairs made of plastic and steel in 5 different colours that were sold from a furniture showroom during a sale.
| Colour | Steel | Plastic |
| C1 | 10 | 12 |
| C2 | 12 | 6 |
| C3 | 8 | 14 |
| C4 | 6 | 18 |
| C5 | 9 | 11 |
The total number of chairs of colour C3 sold are what percentage of all the chairs of these 5 colours sold, both plastic and steel ones put together? [Correct your answer to 2 decimal places.]
Option 1: 17.75 %
Option 2: 20.75 %
Option 3: 14.75 %
Option 4: 23.75 %
Correct Answer: 20.75 %
Solution :
According to the question:
The total number of chairs of colour C3 = 8 + 14 = 22
The total number of chairs in these 5 colours sold, both plastic and steel ones
= 10 + 12 + 8 + 6 + 9 + 12 + 6 + 14 + 18 + 11 = 106
Percentage of C3 = $\frac{22}{106} \times 100$ = 20.75%.
Hence, the correct answer is 20.75%.
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