IB skill practice

Calculate conditional expectation

Use conditional probabilities to calculate an expected value within a group.

Paper 1, Paper 2 5 marks Difficulty 3

Calculate conditional expectation - exam scenario

Within a solar installer group, \(X=7\) with probability 0.42 and \(X=12\) otherwise. Calculate the conditional expected value. Enter the requested value and choose the interpretation that matches the result.

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