A dart is thrown randomly and sticks on the circular dart board shown. Assume that all sectors are the same size and that the dart does not land on a border between shaded areas.
Find the probability that the dart lands on sector number 3 or sector number 7.
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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A. 142
B. -612
C. - 
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