A
What is the rule used when choosing one option AND another option?
Multiplication Principle (Multiplication Rule)
What is the rule used when choosing one option OR another option?
Addition Principle (Addition Rule)
If a student has 3 notebooks and 2 pens to choose from, how many notebook-pen combinations can they have?
3 x 2 = 6 notebook-pen
A student can either take Path A (4 choices) or Path B (3 choices) to school. How many ways can they travel?
4 + 3 = 7ways
A cafeteria offers 5 meal choices, 3 drinks, and 2 desserts. Using the multiplication principle, how many complete meals can a student make?
5 × 3 × 2 = 30 meals
A student needs to create a 3-digit lock code using the numbers 1 to 9, but each digit must be different. How many possible lock codes can be made?
9 x 8 x 7 = 504 possible lock codes
A student ID has 2 letters (A-Z) followed by 3 digits (0-9). If letters and numbers can be repeated, how many different IDs can be made?
26 × 26 × 10 × 10 × 10 = 676,000
A student can choose a school club from Music (4 sections), Arts (3 sections), or Sports (5 sections). How many total choices do they have?
4 + 3 + 5 = 12 choices
A teacher is making a class schedule with 4 subjects in the morning and 3 subjects in the afternoon. How many different schedules are possible?
4 × 3 = 12 schedules
A student needs to make a 4-digit password using the numbers 1-9, but each number can only be used once. How many different passwords can be made?
9 × 8 × 7 × 6 = 3,024 ways
A store offers 6 different school bag styles and 5 different lunchboxes. However, 2 of the lunchboxes are out of stock. How many different bag-lunchbox combinations can be made?
6 × (5 - 2) = 18 ways
A student can get to school by walking (2 routes), biking (3 routes), or taking a bus (4 routes). How many travel options are available?
2 + 3 + 4 = 9 travel options