Simplify your answer

Question

a hat contains 4 marbles; one red, one blue, one orange, and one green. Two marbles are selected at random without replacement from the hat.

 

a) determine the number of points in the sample space

 

b) determine the probability of selecting exactly 1 orange marble

 

c) determine the probability of selecting at least 1 marble that is not orange

 

d) determine the probability of selecting no green marbles

 

for some reason my answers are only just a few numbers off please help

Answer 1

a.  4 choose 2 or 6

 

They are  RB, RO, RG, BO, BG, OG

 

b. 3/6 or 1/2

 

c.  6/g   or 1

 

d. 3/6