Question

Suppose you start with 1 and add random digits in from 0 to 1 to the end of z until z is even or has 6 digits. What is the expected number of digits in z at the end of this process? For example, one possible instance of this process would be1→17→173→1731→17310, at which point the process stops because z = 17310 is even.

Answer 1

b

Suppose you start with 1 and add random digits in from 0 to 1 to the end of z until z is even or has 6 digits. What is the expected number of digits in z at the end of this process? For example, one possible instance of this process would be1→17→173→1731→17310, at which point the process stops because z = 17310 is even.