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Suppose the distribution below represents the probability of a person to make a certain grade in Chemistry 101, where x = the letter grade of the student in the class (A=4, B=3, C=2, D=1, F=0).

2. Determine the probability that a student selected at random would make a C or higher in Chemistry 101. 

X 0 1 2 3 4 

P(X) 0.08 0.22 0.34 0.21 0.15 

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