To find the number of jazz classes given, we need to divide the total number of classes by the number of different types of classes.
The total number of classes is 950, and there are 5 types of classes: jazz, tap, hip-hop, ballet, and lyrical.
So, we calculate the number of jazz classes as follows:
\[ \text{Number of jazz classes} = \frac{\text{Total classes}}{\text{Number of types of classes}} = \frac{950}{5} = 190 \]
Thus, the number of jazz classes given is:
190