#### Answer

4

#### Work Step by Step

Total number of tables is found by adding the different types of tables:
Total tables= 10+12=22
As each server can serve at most 6 tables, divide the total tables by 6 to find number of servers required:
$22\div6=3\frac{2}{3}$
As there cannot be 2/3 of a server the above number is rounded up to the nearest whole number to find least number of servers required.
Thus, least number of servers required= 4