Three CDs are picked at random from a collection of of which four are defective. Find the probability of the following.
a) All three CD’s are defective.
b) All three CD’s are functional probability.
The probability that all the three CDs are defective
There are CDs of which are defective and are selected.
The probability of an event is,
Here, denotes the probability of event , is the favourable outcomes of , is the total outcomes.
The combination formula is where .
Let, be the event that the three CDs are defective
The probability that all the three CD’s are functioning properly.
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