Answer:
Tree diagrams display all the possible outcomes of an event. Each branch in a tree diagram represents a possible outcome. Tree diagrams can be used to find the number of possible outcomes and calculate the probability of possible outcomes.
Step-by-step explanation:
So, when solving this: you’ll want to consider multiples of 7 and 4.
7,14,21,28
4,8,12,16,20,24,28
If you write four +7’s and seven -4’s, they cancel out. Given that that is 11 digits, do it twice and you have your answer.
Eight +7’s
Fourteen -4’s
