Using a density of 1. 0 g/ml for the water added and adding in the mass of the lithium nitrate, what is the total mass of the solution?.

Arecent survey shows that the probability of a college student drinking alcohol is 0.6. further, given that the student is over 21 years old, the probability of drinking alcohol is 0.8. it is also known that 30% of the college students are over 21 years old. the probability of drinking or being over 21 years old is