the mathematics Department of a college has 11 male professors 12 female professors 9 male teaching assistants and 12 female tea
ching assistant if a person is selected at random from a group find the probability that the selection person is teaching assistant or a female 
1 answer:
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Answer:
v₁ = 2.5; v₂ = 0.5.
Step-by-step explanation:
4v² + 8v + 5 = 10
4v² + 8v + 5 - 10 = 10 - 10
4v² + 8v - 5 = 0
D = 8² - 4 · 4 · (-5) = 64 + 80 = 144