7.6(E): Find the probabilities of a simple event and its complement and…
Find the probabilities of a simple event and its complement and describe the relationship between the two.
The Texas Essential Knowledge and Skills (TEKS) for Mathematics outcome 7.6(E) (Proportionality) for Grade 7 says: “Find the probabilities of a simple event and its complement and describe the relationship between the two.” This Fieldbook unit teaches it hands-on, with everyday materials and a printable teacher guide and student sheet for every lesson. Official wording: Texas Essential Knowledge and Skills (TEKS) for Mathematics.
Is It Fair? Chance and Probability Grades 6–7
Is a six harder to roll? Which bag gives the best chance of a red? Why does horse 7 always win? Can you design a fair game? Four lessons with dice, coins, counters and spinners where students test their hunches and find out what chance really does.
- Which bag would you pick from? 50–60 min
To win a prize you must pull a red counter from one of four bags. Teams find that the bag with the most red counters gives the worst chance, and that two bags with different numbers of counters give exactly the same chance. Students find and compare probabilities, use the complement, and test their predictions by drawing with replacement.
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