Say whether the outcomes of each experiment are equally likely, and why…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Say whether the outcomes of each experiment are equally likely, and why.
- Picking one of four identical cards marked A, B, C and D from a bag, without looking.
- A scooter starts, or it does not start, on a cold morning.
- A spinner with sectors of , , and lands on one of its four colours.
Need a reminder? The key ideaShow
An experiment has outcomes you cannot know in advance. An event is a set of outcomes; its favourable outcomes make it happen. Outcomes are equally likely only when none has a better chance than another, as with a fair die or equal sectors.
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. (a) Equally likely. The cards are identical and picked without looking.
Step 2. (b) Not equally likely. The cold, the battery and the engine decide it.
Step 3. (c) Equally likely. The four sectors are the same size.
Answer: (a) and (c) are equally likely; (b) is not.
Discussion (0)
Log in to join the discussion.
Loading…