EM-2828

Complementary events

E Math · Secondary 4 · Hard · Complementary events

A bag contains 30 marbles, 6 of which are blue. Three marbles are drawn at random without replacement. What is the probability that at least one marble is blue?

$\dfrac{509}{1015}$
$\dfrac{506}{1015}$
$\dfrac{6}{30}$
$\dfrac{18}{29}$

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