How to Apply Integers Addition and Subtraction Rules?
Add integers with the same sign by adding their absolute values and keeping that sign. Subtraction can be rewritten as addition of the opposite. TL;DR: Integers can feel slippery until you nail two rules. Same signs? Add their sizes and keep the sign, so negative 5 plus negative 3 is negative 8. Different signs? Subtract […]
How to Solve Venn Diagrams and the Addition Rule?
In a Venn diagram, this might look like this: (color{blue}{P(A∪B)=P(A)+P(B)}) Venn Diagrams and the Addition Rule, Example 1: In a group of (103) students, (32) are freshmen and (46) are sophomores. Find the probability that a student picked from this group at random is either a freshman or sophomore. First, find the probability of freshman […]