Exam-Style Question on Probability Distribution
A mathematics exam-style question with a worked solution that can be revealed gradually
Question id: 396. This question is similar to one that appeared on an IB Standard paper in 2019. The use of a calculator is allowed.
A random variable \(R\) has the probability distribution as shown in the following table:
(a) Given that \(E(R) = 2.85\) find \(a\) and \(b\).
(b) Find \( P(R \gt 2 )\).
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