What is the probability of arriving at a traffic light when it is red if the red signal is flashed for 15 sec, the yellow signal for 5 sec, and the green signal for 55 sec?
?

A. The probability is 0.10
B. The probability is 0.20
C. The probability is 0.40
D. The probability is 0.30


Answer: B

Mathematics

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Consider only the discriminant, b2 - 4ac, to determine whether one real-number solution, two different real-number solutions, or two different imaginary-number solutions exist.x2 + 12x + 36 = 0

A. Two different real-number solutions B. One real solution C. Two different imaginary-number solutions

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