It is given that the sample size is half or [tex]\frac{1}{2}[/tex] of an ounce.
It is also given that a jar of jam contains 12 ounces.
Let the number of people who sample from the jar be "x". Then it is clear that:
[tex]\frac{1}{2}\times x=12[/tex]
Therefore, we will have [tex]x=\frac{12}{\frac{1}{2}}=12\times 2=24[/tex]
Therefore, 24 customers at Fair Weather Farmer's Market who love to sample Ava's homemade strawberry jam can sample from one jar.