A bag contains Violet (V), Yellow (Y), Red (R), and Green (G) balls. On counting them, the following results are obtained:
(i) The sum of Yellow balls and twice the number of Violet balls is 50.
(ii) The sum of Violet and Green balls is 50.
(iii) The sum of Yellow and Red balls is 50.
(iv) The sum of Violet and twice the number of Red balls is 50.
Which one of the following Pie charts correctly represents the balls in the bag?

Let V, Y, R, and G represent the number of Violet, Yellow, Red, and Green balls, respectively. The problem statements translate to the following equations:
We can solve this system of linear equations step-by-step:
The number of balls are:
First, find the total number of balls:
Total balls = \( V + Y + R + G = 10 + 30 + 20 + 40 = 100 \).
Now, calculate the proportion of each color:
The correct pie chart must represent these proportions: 10% Violet, 30% Yellow, 20% Red, and 40% Green.
Comparing these proportions to the options, the pie chart provided in Option 1 represents these values accurately.
The image URL for the correct pie chart is:
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Which type of battery provides the lowest revenue per unit?
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