EM-2888

Independent events

E Math · Secondary 4 · Hard · Independent events

A bag contains 5 red counters and 7 blue counters. Two counters are drawn at random without replacement. What is the probability that the two counters are of different colours?

$\dfrac{35}{66}$
$\dfrac{5}{12}$
$\dfrac{7}{22}$
$\dfrac{35}{132}$

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