SOLUTION: About 20% of the southern Hemisphere is land. South Africa takes up about 5% of the land in the southern Hemisphere. A piece of space junk is falling to Earth such that it would hi

Question 1055802: About 20% of the southern Hemisphere is land. South Africa takes up about 5% of the land in the southern Hemisphere. A piece of space junk is falling to Earth such that it would hit anywhere randomly
Calculate the probability that it would hit:
A) the southern Hemisphere
B) land in the Southern Hemisphere
C) sea in the Southern Hemisphere
D) South Africa
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
It has a 50% chance of hitting in the Southern Hemisphere.
It has a 0.5*0.2=0.1 probability of hitting land in the Southern Hemisphere.
It has a 0.4 probability of hitting sea in the Southern Hemisphere.
It has a 0.1*0.05=0.005 probability of hitting South Africa.
Multiplication here, because of randomness or independence of the event after the first and second condition are met.
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