Question 1031431
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A traffic light shows red for 3 minutes 30 seconds orange for 30 seconds for every minutes that green light shows. 
Paul saw the light on his way to work. what is the probability that it is 

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a. red                    {{{3.5/5}}} = 0.7     (3.5 = 3.5 minutes; 5 = 5 minutes = 3min 30sec + 30 sec + 1 min)
b. green                  {{{1/5}}}   = 0.2
c. orange                 {{{0.5/5}}} = 0.1

d.orange or red           a + c

e. not red                1 - a

f. blue                   0

g. not blue               1
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