The correct answer is: decrease; $195; $190; $165.
A study found the noise from rock concerts to be harmful.
To correct the externality created by the concerts, the government imposes a tax $30 on sale of each unit.
The price of tickets was initially $190.
After the imposition of the corrective tax, the price increased to $195.
This increase in price will cause the demand for tickets to decrease. As a result, the number of concert tickets sold will decrease.
The socially optimal price of the tickets is $195, as this price eliminates externalities.
The private market price is the price which was creating externalities, in this case, it is $190.
We can find the price received by the firms by deducting the tax amount from the new price.
The price received by the firms is
= $195 - $30
= $165