Expected Value Shift Transformation

00:00 3 marks

Let $X$ be a discrete random variable such that $P(X = k) = \frac{1}{4}$ for $k = 1, 2, 3, 4$. Calculate $E(X+5)$.

Hint Hint

Hint

Recall that the expected value operator is linear, i.e. $E(X + c) = E(X) + c$.

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Answer Answer

Complete Answer

$E(X+5) = 7.5$

Mark Scheme Mark Scheme

Answer Explanation Answer Explanation

Examiner Tips Examiner Tips

Common Errors Common Errors

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Formula Booklet

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