Elementary probability, bag and counters, maximisation, C1.

[STEP II 2008 Question 13 (Mechanics)]

Discs, conditional probability, C1.

[STEP I 2007 Question 13 (Probability and Statistics)]

Bag of sweet, maximisation, C1.

[STEP I 2006 Question 14 (Probability and Statistics)]

Balls out of bag, expectation, sum of squares, C1-ish.

[STEP I 2003 Question 12 (Probability and Statistics)]

A bag of balls, combinatorics, C1.

[STEP III 2001 Question 12 (Probability and Statistics)]

Key, front door, elementary probability, combinatorics, C1.

[STEP I 2000 Question 12 (Probability and Statistics)]