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Problem
An urn contains 5 defective and 7 non-defective bulbs. Three bulbs are drawn successively without replacement. What is the probability that at least one of the three bulbs drawn is defective? a)
21
44
\dfrac{21}{44}
44
21
b)
37
132
\dfrac{37}{132}
132
37
c)
37
44
\dfrac{37}{44}
44
37
d)
7
44
\dfrac{7}{44}
44
7
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