Answer:
168
Explanation:
What are you finding hard about this, especially in high school?
How many people can sit at the 16 booths? 4 each means 64, right?
How about the 20 tables that seat 4 each? Another 80.
How about the 8 tables that seat 2? 16 more.
And the counter holds 8 people.
Add them up: 64 + 80 + 16 + 8 = 168