To find out how many jazz classes are given, we can divide the total number of classes by the number of class types.
There are 5 types of classes:
\[ \text{Jazz, Tap, Hip-Hop, Ballet, Lyrical} \]
Total classes conducted = 950.
To find the number of each type of class:
\[ \text{Number of each type of class} = \frac{\text{Total classes}}{\text{Number of class types}} = \frac{950}{5} = 190 \]
Thus, the number of jazz classes conducted is:
\[ 190 \]
So, the answer is:
190