To find the relative frequency of Hazel's T-shirts, you first need to calculate the total number of clothing items she has:
- Number of T-shirts: 15
- Number of short-sleeve blouses: 10
Total number of items = Number of T-shirts + Number of blouses = 15 + 10 = 25
Now, the relative frequency of the T-shirts is calculated by dividing the number of T-shirts by the total number of items:
\[ \text{Relative frequency of T-shirts} = \frac{\text{Number of T-shirts}}{\text{Total number of items}} = \frac{15}{25} \]
Now, simplify the fraction:
\[ \frac{15}{25} = \frac{3}{5} = 0.6 \]
Thus, the relative frequency of Hazel's T-shirts in decimal form is:
0.6