Probability of Simple Events

Start with Probability of Simple Events before the fraction, decimal and percent sheet. Use the Probability Scale Sort and the Event Probability Review as checks after the rest.

Find 16 simple probabilities from a 1 to 12 spinner, a number cube and color tiles, like P(prime). The directions on the page read: Spinner parts are equal. Use each picture for one spin, roll or pick. Find each probability as a fraction in simplest form. Letters name the colors: R red, B blue, G green, Y yellow. The page opens with a worked example, and an answer key is included.

Yes, both. We made it for 8th grade probability, and it works the same at home or at school. At home, a student can work through it alone and then go over it with you, which shows quickly what is solid and what needs another look. In class it works as independent practice, homework or a warm-up, and you can print one copy or a full set.

Mutually exclusive events cannot happen at the same time, like rolling an even number and rolling a 5. To find P(A or B), add the two probabilities. The Mutually Exclusive Events sheet practices this with fractions, decimals and percents.

Add P(A) and P(B), then subtract P(A and B) so the shared outcomes count once. The Overlapping Events sheet uses Venn diagrams of pets, groceries and clubs to show the overlap.

The probability that an event does not happen is 1 minus the probability that it does. If P(a hit) is 0.28, then P(not a hit) is 0.72.

Yes. Each of the 10 simple probability sheets comes with an answer key.