IB Mathematics Applications and Interpretation Quiz
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STATISTICS AND PROBABILITY
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A discrete random variable XX has the probability distribution P(X=1)=pP(X=1)=p, P(X=2)=qP(X=2)=q, and P(X=3)=0.3P(X=3)=0.3. Given that the expected value E(X)=1.9E(X) = 1.9, what is the value of pp?
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