A Box Contains One Red, Three Blue and Two Green

A box contains one red, three blue and two green marbles. Two marbles are randomly selected without replacement. Let
R = {The selected marble is red.}
B = {The selected marble is blue.}
G = {The selected marble is green.}
C = {Both marbles selected are the same color.}
D = {At least one of the marbles is blue.}
a. Find P(C).
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b. Find P(D).
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c. Find
.
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d. Find
.
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e. Find P(D | C).
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