A box contains $5$ red balls and $4$ blue balls. A ball is selected, its colour is recorded and

Question

A box contains $5$ red balls and $4$ blue balls. A ball is selected, its colour is recorded and it is replaced. A second ball is then selected. State whether the two selections are independent. Give a reason. Find the probability that exactly one red ball is selected.

Accepted Answer

(a) independent; (b) $\frac{40}{81}$.

Sec 3/4 E Math T13-Q14 - Replacing a selected object before a second draw

Sec 3/4 E Math T13-Q14 - Replacing a selected object before a second draw

Solution:

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