Question

how did middle class envised to an privilege class in French Revolution?

Answer 1

The French society was divided into three estates. Out of these first and second were privileged. The third class comprised of businessman, peasants, labour etc.

Clergy (first estate) - It was a group of people with special functions in church.
They were exempted from taxes.
The church levied a tax Tithe which comprised of one-tenth of agricultural produce.

 Nobility (second estate) -

They too did not have to pay taxes to the state.
Further, they enjoyed feudal privileges. They could take feudal dues from the peasants who were bound to offer services to Lord.