A box contains 6 defective bulbs and 10 functional bulbs. If 4 bulbs are to be chosen at random. what is the probability that there are 2 defective bulbs and 2 functional bulbs selected?
There are different bulbs. There are ways to choose bulbs. There are ways to make a set that contains defective bulbs and ways to make a set that contains functional bulbs. We get the following probability: .
Thus, the answer is (it is rounded to decimal places).
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