Question 136683This question is from textbook Algebra 2
: You are performing an expirement to determine how well plants grow under different light sources. Out of the 30 plants in the expirement, 12 receive visible lights, 15 receive ultraviolet light, and 6 receive both visible and ultraviolet light. What is the probability that a plant in the expirement receives either visible light or ultraviolet light?
This question is from textbook Algebra 2
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! You are performing an expirement to determine how well plants grow under different light sources. Out of the 30 plants in the expirement, 12 receive visible lights, 15 receive ultraviolet light, and 6 receive both visible and ultraviolet light. What is the probability that a plant in the expirement receives either visible light or ultraviolet light?
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P(A or B) = P(A) + P(B) - P(A and B)
P(vis or ultra) = P(vis) + P(ultra) - P(vis and ultra)
P(vis or ultra) = 12/30 + 15/30 - 6/30 = 21/30 = 7/10
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Cheers,
Stan H.
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