When two events (call them A and B) are Mutually Exclusive it is impossible for them to happen together: P(A and B) = 0. The probability of A and B together equals 0 (impossible).
Generation Z. Generation Z (also known as The Founders, Post-Millennials, the iGeneration, Plurals or the Homeland Generation) is the demographic cohort after the Millennials.
Generation X is the generation born between approximately 1965 to 1980, although the birth years are sometimes cited as early as 1960, and as late as 1989. Other names used interchangeably with Generation X are 13th Generation and Baby Busters. Most of this generation are children of The Silent Generation.