To identify the ratio of plain blue bugs to the total number of bugs, we need to determine how many plain blue bugs there are and the total number of bugs shown in the illustration.
Based on your description:
- The first group consists of 10 shaded insects (2 rows of 5 insects each).
- There are 2 additional insects with different shading.
Assuming all insects (shaded and plain) are the same size and that the colored insects include all the insects depicted:
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Total number of bugs:
- 10 shaded insects + 2 differently shaded insects = 12 total bugs.
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Plain blue bugs:
- If only shaded insects are present, then it is likely that the plain blue bugs make up any unmentioned insects. However, since you described only shaded insects, I assume there are no plain blue bugs mentioned.
- If the 2 differently shaded insects are the plain blue bugs, then you have 2 plain blue bugs.
Now, to find the ratio of plain blue bugs to total number of bugs:
\[ \text{Ratio} = \frac{\text{Number of plain blue bugs}}{\text{Total number of bugs}} = \frac{2}{12} = \frac{1}{6} \]
Therefore, the ratio of plain blue bugs to the total number of bugs is 1:6.