How long would someone with lung cancer typically live?

Not too long: Over half of people with lung cancer die within one year of being diagnosed.The lung cancer five-year survival rate (16.3%) is lower than many other leading cancers , such as the colon (65.2%), breast (90.0%) and prostate (99.9%).However, only 15 percent of lung cancer cases are diagnosed at an early stage. For distant spread to other organs the five-year survival rate is only 3.5 percent.

30-40% alive at five: Depends on cell type, extent, age and other personal risk factors most results are tabulated at five year survival from diagnosis confirmation.

Depends : On response to treatment; survival statistics are good for population but may not be reflective of how a patient responds- can be more or less.