Passing by the workstations of colleagues involuntarily pay attention that instead of the faded IDE interface, in which, in fact, the programmer is supposed to be most of the workday, you see on the screen a bright design of some news site.
In general, this is normal - a person must sometimes switch. Only now it is interesting - how often does he do it? And having obtained from the shelf a handbook on mathematics by T. Corne, undertook to solve the following abstract problem: The manager 10 times a day passes randomly by an employee.An employee is sometimes randomly distracted from work to read news on his favorite sites.Estimate what the guaranteed time the employee spent reading per day with a probability of 99% if he caught reading 1,2,3..10 times.