X

X

is a discrete random variable with a probability function which is a member of the(

a

,

b

,

0

)

(a,b,0)

class of distributions. You are given:

(i)Pr

(

X

=

0

)

=

Pr

(

X

=

1

)

=

0.25

Pr(X=0)=Pr(X=1)=0.25

(ii)Pr

(

X

=

2

)

=

0.1875

Pr(X=2)=0.1875

CalculatePr

(

X

=

3

)

Pr(X=3)

.