Sum of series, expectation.

[STEP II 2014 Question 13 (Mechanics)]

Expectation algebra, toy penguins from cereal boxes.

[STEP I 2010 Question 12 (Probability and Statistics)]

Expectation, median.

[STEP I 2008 Question 12 (Probability and Statistics)]

Expectation, variance and covariances, sum of random variables.

[STEP III 2007 Question 12 (Probability and Statistics)]

Marginal distribution, mean, expectation, probability, unbiased 12-sided die, dice.

[STEP III 1990 Question 15 (Probability and Statistics)]