EM-2835

Combined events

E Math · Secondary 4 · Medium · Combined events

A box contains 50 bulbs, of which 5 are defective. Two bulbs are chosen at random without replacement. What is the probability that both bulbs are defective?

$\dfrac{2}{245}$
$\dfrac{1}{10}$
$\dfrac{4}{49}$
$\dfrac{5}{50}$

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