A Karate club consists of 52 persons holding a black belt (highest rating) , 69 persons holding a brown belt (middle rating) , and 77 persons holding a purple belt (lowest rating) . What is the Probability that a randomly-selected club member holds a brown belt or a purple belt?
A) 0.644
B) 0.737
C) 0.356
D) 0.263
Correct Answer:
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