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1,Supposed the 2 cellphone are tested at random, let D represent the deffective cellphone and let the N none deffective.
What are the possible sample spaces for the experiment?
a. DD,NN d.DD,DN, NN, ND
b.DD,ND,NN
c.DD,DN,NN

2, how many possible outcomes will occur from the experiment?
A. 2
B.3
C.4
D.5

3. If we let X be the random variable representing the number of defective cellphones,
what are the possible values of the random variable?
A. 0, 1 C. 1, 2, 3
B. 0, 1, 2 D. 0, 1, 2, 3
4. In a survey conducted to families in a certain community, a researcher is
interested in the total salary of each family. Is this a random variable?
A. Undecided C. Yes, it is a random variable
B. Cannot be determined D. No, it is not a random variable