Let X be the event that a person chosen at random from anywhere on earth will live in either Asia, Europe, or South America What is P(X)?
North
Continent
Africa
South
America
Asia
Europe
America
Oceania
Population
distribution
0.23
0.08
0.06
0.55
0.07
0.01
D
0.45
0
o
o 0.55
0.32
o 0.68
1
2
3
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Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)