i need help with this probablilty A box contains a shipment

i need help with this probablilty

A box contains a shipment of N(Ngt4) computer chips. Of which four are defective. Four chips are randomly selected and examined as to whether or not the chips are defective . Describe the samples space for this experiment . What is the probability that How many different combinations are in the samples space? Exactly one of the four chips is defective? All four chips are defective ? Two chips are defective?

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