What is the relationship between counting rate and rate of decay?

[Dars]

what is "counting rate"?

Homework Statement

Is "counting rate" the same as "rate of decay"? This problem asks about counting rate, but i can't see this term anywhere in my physics book.. Is it like an alternate term for "rate of decay"
(also, counting rate isn't even on wikipedia)

Homework Equations

The Attempt at a Solution

 

[Delphi51]

A Geiger counter "counts" the number of particles that hit it (or a human counts the clicks over a minute or two). The number of hits per minute wouldn't be very helpful unless you knew what fraction of the particles were being intercepted by the counter.