EM-2853

Combined events

E Math · Secondary 4 · Medium · Combined events

A box contains 5 red pens and 7 blue pens. Three pens are drawn at random one after another without replacement.

Find the probability that exactly two of the pens drawn are red.

$\dfrac{7}{22}$
$\dfrac{5}{22}$
$\dfrac{7}{44}$
$\dfrac{5}{44}$

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