If boxes 2, 3, and 4 all contain balls that are the same color as each other, then which one of the following must be...

NS1 on January 3, 2021

Question Approach

How does one setup the approach to this question and make an efficient use of time?

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shunhe on January 4, 2021

Hi @NS1,

Thanks for the question! I would set this one up in a pretty straightforward manner. You can draw six lines in a vertical (or technically in a horizontal) manner, and then diagram the rules:

R > W

>=1G under all Rs

And then from here you can think about implications of these rules and then move on to the questions. For example, you can think about what happens if there are two white balls: then there have to be three red balls, and thus one green ball. Or if there’s only one white ball, then there are more possibilities.

Hope this helps! Feel free to ask any other questions that you might have.