An insurance company offers its policyholders a number of different premium payment options. For a randomly selected policyholde
r, let X 5 the number of months between successive payments. The cdf of X is as follows: 0 x<1
0.30 1< x <3
F(x)= 0.40 3< x <4
0.45 4< x <6
0.60 6< x <12
1 12< x
Required:
a. What is the pmf of x?
b. Using just the cdf, compute P(3< x <6)and P(4< x)