I have a very interesting problem, but I don't have idea how to solve it. How many numbers do we need to take from the table of random numbers to be sure( with probability at least $0.9$), that we have at least one even number.
I know, that I should use CLT.
The probability to draw $n$ odd numbers in a row is $2^{-n}$, and we want this to be smaller than $0.1$. Hence four drawings are enough.