To find the probability of a moth being black, we first need to find the total number of moths and then calculate the probability based on that total.
-
Calculate the total number of moths: \[ \text{Total moths} = \text{Brown} + \text{Yellow} + \text{Black} = 47 + 15 + 34 = 96 \]
-
Calculate the probability of a moth being black: \[ \text{Probability (black)} = \frac{\text{Number of black moths}}{\text{Total number of moths}} = \frac{34}{96} \]
-
Calculate the probability and convert to percentage: \[ \frac{34}{96} \approx 0.3542 \] To convert this to a percentage: \[ 0.3542 \times 100 \approx 35.42% \]
Rounded to the nearest whole number, the probability of a moth being black is approximately 35%.
So, the correct answer is 35%.