Each passage below contains an inductive argument.Determine what kind of argument it is and evaluate its strengths and weaknesses.

Each passage below contains an inductive argument. Determine what kind of argument it is and evaluate its strengths and weaknesses.

1.    An investigator at Fanciepahnts Science Institute studied several thousand heroin users and learned that 70 percent of them had used marijuana before they tried heroin. He concludes that roughly 70 percent of all marijuana users will go on to try heroin.