1. Which of the following is a valid probability distribution for a sample space

Question

1. Which of the following is a valid probability distribution for a sample space S = {a,b,c,d}?

a.       Pr(a) = .6, Pr(b) = 0, Pr(c) = .3, Pr(d) = .1

b.      Pr(a)= -.2 Pr(b) = .5, Pr(c) = .4, Pr(d) = .3

c.       Pr(a) = .3 Pr(b) = .1, Pr(c) = .2, Pr(d) = .5

d.      Pr(a) = .5, Pr(b) = .2, Pr(c) = .1, Pr(d) = .3

e.      NONE

2. Two fair dice are rolled. What is the probability that the numbers that appear add to 4

A.      1/12

B.      1/6

C.      1/5

D.      1/36

E.       NONE

3. What is the probability of either getting a black card or an ace in one draw from an ordinary deck of 52 cards?

a.       7/13

b.     

Explanation / Answer

http://www.sheltonstate.edu/Uploads/files/faculty/Tina%20Evans/MTH%20100/Chapter%206%20Practice%20Test%20Problems%20(FA06).pdf

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