From 1, 2, 3, , 320 one number is selected at random. Find the probability that it is either a multiple of 7 or a multiple of 3.

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1.	From 1, 2, 3, , 320 one number is selected at random. Find the probability that it is either a multiple of 7 or a multiple of 3.
A.	72%
B.	42.5%
C.	12.8%
D.	63.8%
Answer» C. 12.8%

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