A strange MC question

I don't know how the question setter thought. This question really has no definite answer.

Everyone knows that a count rate has absoltuely no physical meaning. It is only a figure shown on a radiation detector. The figure depends on a number of factors which are highly instrument dependent. These include the type of detector (e.g. a GM or scintillation counter), the response and counting efficiency of a particular detector, the shape, dimensions and nature of the radiation senstive material (e.g. ZnS or NaI as scintillator), and afer all, the electronics that transforms the counted pulses into count-rates.

Also, which type of background radiation so counted is important. An alpha detector could record a background count-rate of just a few counts in a minutem. A beta detector would have tens to hundreds of counts in a minute. A beta-gamma detector varies a lot, count-rates of several hundred to thousands of counts in a second are possible.

Without specifying the type of instrument used, the question has no meaning at all.