Final answer:
In a criminal trial, a jury typically consists of 12 members who deliberate and come to a unanimous decision on the case.
Step-by-step explanation:
In a criminal trial, a jury consists of 12 members who are responsible for hearing evidence and determining the innocence or guilt of the accused. Upon agreement to serve, they include one person who acts as a foreman or forewoman to coordinate the jury's deliberations. This format, which includes 12 jurors, is widely followed in the United States and is ensured by the Seventh Amendment. During deliberations, jurors must come to a unanimous decision; otherwise, a mistrial may be declared.