Real-World Probability in Action

Exploring probability through everyday situations Grade 7 Mathematics

Weather Predictions

Meteorologists use probability to forecast weather 70% chance of rain means it will rain 7 out of 10 similar days Weather apps show probability percentages daily

Weather Prediction Challenge

Look at this week's weather forecast Calculate: If there's a 40% chance of rain each day, what's the probability it WON'T rain? Discuss: Why might weather predictions be wrong sometimes?

Sports Statistics

Free throw percentages show probability of success A 75% free throw shooter makes 3 out of 4 shots on average Past performance helps predict future results

Sports Probability Question

If a basketball player has made 80% of their free throws this season, what do you predict will happen if they shoot 10 free throws in the next game?

Medical Testing

Medical tests have accuracy rates expressed as probabilities A test that's 95% accurate fails 5% of the time Doctors consider probability when diagnosing patients

Gaming vs. Real Life

{"left":"Video games use random number generators\nLottery tickets have very low winning probabilities","right":"Card games involve calculated risks\nInsurance companies use probability to set rates"}

Coin Flip Experiment

Work in pairs to flip a coin 20 times Record your results: heads or tails Calculate your percentage of heads Compare with other groups - did everyone get exactly 50%?

Transportation Safety

Airlines track safety statistics using probability Traffic light timing uses probability models GPS apps calculate fastest routes using probability of delays

Manufacturing Quality Control

Quality Control Challenge

A factory tests 1 out of every 50 products. If they find 2 defective items in their sample of 100 tested products, what can they estimate about their total production?

Online Shopping

Product ratings show probability of customer satisfaction Shipping estimates use probability of delivery delays Recommendation algorithms predict what you might like