In EuroMillions what is the number of possibilities of number sets knowing that one can only pick a number for each decimal house (1 to 9, 10 to 19...), and occasionally picking two numbers on the same house, making one number for the other houses except one of them will have none because one can...

I have a problem where I'm supposed to determine if a lottery system is profitable. I solved the problem and found it to be profitable, but I am not 100% sure about all of my calculations. Below is the rules of the game, and my calculations. There is a total of $30$ numbers to draw from and...

Firstly my level of mathematics understanding is only at O level or GCSE level if you like however my education level is just under degree level having a HND in Computer Science. Someone is saying that the overall chance of winning any prize on the EuroMillions is 1 in 13. Is this some mathemati...