A detector is used to count the number of gamma photons emitted by a radioactive source. If the number of counts recorded in exactly 20 seconds is 10000, the error in counting rate per second is
The Attempt at a Solution
I don't know anything about this problem. I thought the counting rate would be 500 per second. I went through other threads, and in some Poisson distribution is mentioned. I don't know if it is relevant here... Can someone help me?
Thank you for your time...