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A fair die is rolled once. Find the probability of (a) a prime number, (b) a multiple of 3, (c) not…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A fair die is rolled once. Find the probability of (a) a prime number, (b) a multiple of , (c) not a one.
Need a reminder? The key ideaShow
A probability is a number from 0 to 1. With equally likely outcomes, , and .
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. Prime. : .
Step 2. Multiple of 3. : .
Step 3. Not a one. .
Answer: , and .
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