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A bottle cap is flipped 240 times. It lands top up 168 times.
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A bottle cap is flipped times. It lands top up times.
- Estimate the probability that it lands top up.
- How many times do you expect it to land top up in flips?
Need a reminder? The key ideaShow
Relative frequency = successes divided by tries. It estimates the probability, and a long run settles close to the true value.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. Estimate. .
Step 2. Expect. times.
Answer: about ; about times. The real count will be close to 630, not exactly 630.
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