Data Analyst Interview Question
Question: Every month you buy a ticket in a lottery that offers one chance in a million of winning. What is the chance that you will win at least once, if you keep this up for twenty years?
A) 0.15 - 0.25
B) 0.01 - 0.06
C) 0.30 - 0.40
D) None of the Above
D) None of the above is true. 20 years means 240 months. So the chance of winning at least once = 1- (999,999/1000,000)^240 which is close to zero.