Final answer:
An mbira typically has between 22 and 28 metal keys.
Step-by-step explanation:
An mbira is a traditional African musical instrument that is often referred to as a thumb piano. It consists of a wooden soundboard with metal keys attached to it.
The number of metal keys on an mbira can vary, but it typically has between 22 and 28 keys. These keys are plucked with the thumbs or fingers to produce different notes.