Mathematics 9709 · AS & A Level · Discrete random variables

Discrete random variables — practice question

A firm makes small sweet boxes containing 5 jellies and 3 chocolates. Jemeel randomly picks 3 sweets from one box.
(a)[4]

Construct the probability distribution table for how many jellies Jemeel selects.

(b)[3]

The company also makes large boxes of sweets. For any large box, the chance that it has more jellies than chocolates is $0.64$. $10$ large boxes are selected at random. Find the probability that at most $7$ of these boxes contain more jellies than chocolates.

Worked solution & mark scheme

This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Probability distribution table that correctly lists outcomes $x=0,1,2,3$” …

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