Acomputer virus is trying to corrupt two files. the first file will be corrupted with probability 0.4. independently of it, the second file will be corrupted with probability 0.3. compute the pmf of x, the number of corrupted files.
a = probability of corrupted first file
b = probability of corrupted second file

for one file: For X = 1, 

P(~A and B)

or 

P(A and ~B) = 

0.6 * 0.3 + 0.4*0.7 = 0.46

Oh, I think I see, the universe for P(A and B) is first 

or 

second file while P(~A and B) or P(A and ~B) the universe is first, second or no file.

hi,

6x times 4 is 24x and 5 times 4 is 20, so the answer is 24x+20.

hope this and for a little humor i am groot.

$450.00 for 6 weeks

or

$300

step-by-step explanation:

$200.00 for first week $50.00 x5 equals $250 plus $200 equals $450.00 for six weeks.

$200 for first week

$200 x 0.10 = $20

$20 x 5 = $100

$200 + $100 = $300