Question

Probability has as unit of
measurement.
1. rupees
2. centimeter
3. hours
4. none of these.​

Answer 1

Probability, as such, has no units — it is simply a dimensionless number. A probability density, however, measures probability over a unit of space (or time, or phase space, or whatever), and thus its unit is the inverse of the unit you're using to measure the space the density is distributed over.

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