There are 12 face cards and 4 fours in a deck so 16/52 total which can be simplified to
4/13


Multiply eq(1) by 2 and eq(2) by 1




Now
Put in eq(1)






Whenever you have a decision tree like this, the probability of reaching a specific leaf is the multiplication of the probabilities of each step you have to reach the leaf.
So, in order to reach the "hardcover and nonfiction" leaf, we have to take the "buys hardcover" branch (probability 0.35), and then the "buys nonfiction" branch (probability 0.55).
Given what we said above, the probability for "hardcover and nonfiction" is

71.83 is taken away from your monthly check. $4,211 - 80% = $842.20.
$842.20 divided by 12 (the number of months in a year) equals 71.83 with a repeating 3.
Answer:
it would be A
Step-by-step explanation: