EM-2825

Combined events

E Math · Secondary 4 · Hard · Combined events

A box contains 3 green, 4 yellow and 5 white balls. Three balls are chosen at random without replacement. Find the probability that at least one green and at least one yellow ball are chosen.

$\dfrac{9}{22}$
$\dfrac{3}{11}$
$\dfrac{9}{55}$
$\dfrac{11}{22}$

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