To find the probability of a moth being black, you can use the following formula:
\[ \text{Probability} = \frac{\text{Number of black moths}}{\text{Total number of moths}} \]
From the data provided:
- Number of brown moths = 47
- Number of yellow moths = 15
- Number of black moths = 34
First, calculate the total number of moths:
\[ \text{Total} = 47 + 15 + 34 = 96 \]
Now, calculate the probability of a moth being black:
\[ \text{Probability of black moth} = \frac{34}{96} \approx 0.3542 \]
To express this as a percentage:
\[ 0.3542 \times 100 \approx 35.42% \]
Rounding to the nearest whole number gives us approximately 35%.
Therefore, the approximate probability of a moth being black is 35%.