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Suppose three cell phones are tested at random where D represent the defective cell phone and N represent the non-defective cell phone. Let X represents the number of defective cell phones that occur. Show the values of tbhe random variable X.

Answer :

Let X represents the number of defective cellphones.

Out of the three cellphones tested at random,

Let D represents the cellphone is defective & N represents that the cellphone is non-defective.

Sample space & the Random Variable X

The sample space and the corresponding Values of the Random Variable X are obtained as:

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