Probability

[junior totem]

I did 3 basic problems but I wanted to see if they were right or if there’s a better way to solve the problem, could anyone help please?

[forest terrace]

1. Ask your question and show the work you've done so far. If you've posted a screenshot of a question, specify which part you need help with.
2. Wait patiently for a helper to come along.
3. Once someone helps you, say thank you and close the thread with:

   +close
   

4. Feel free to nominate the person for helper of the week in #helper-nominations
5. Do not ping the mods, unless someone is breaking the rules.
6. If you're happy with the help you got here, and the server overall, you can contribute financially as well:

[junior totem]

Work I’ve done so far

[latent swallow]

reduced fraction

[junior totem]

You’re right, thank you ;)

Are any of these problems wrong though?

[forest galleon]

@junior totem has given 1 rep to @latent swallow