A box contains $2$ identical pink marbles and $6$ identical blue marbles. A marble was taken out

Question

A box contains $2$ identical pink marbles and $6$ identical blue marbles. A marble was taken out at random from the box, the colour was noted and the marble was replaced. A second marble was then taken from the box. Find the probability that the marbles were both blue, of different colours.

Accepted Answer

(a) 9/16; (b) 3/8.

Probability of Independent Events: Modeling Multi-Stage Experiments

Probability of Independent Events: Modeling Multi-Stage Experiments

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