April 13, 2022
Probability – chances to win
The way to express probability is from 0.00 to 1.00 (can be in decimal, percent or fraction)
P = 0 or 0% impossible to win
P = 1.00 or 100%, certainty (you will win for sure)
Cannot have a P of more than 1.00
You must express probability in numbers.
Experiment 1, coin flips
- flip 3 coins (same type of coins, say all pennies, dimes, or nickels or quarters)
- order is not important (HHT = HTH = THH, they are the same)
- flip three coins 70 times, tally the results in this chart
- Prediction: which combination occurs most often? Least often
- after the experiment, write down which combination occurs most often/ least ofen and compare to your prediction
Combinations | Tally | Probability |
HHH | ||
HHT, HTH, THH | ||
TTH, THT, HTT | ||
TTT |
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