Math: can anyone help me with this simple - yet tricky- question
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Math: can anyone help me with this simple - yet tricky- question

[From: ] [author: ] [Date: 11-10-29] [Hit: ]
the right-hand bag originally contained an *even* number of marbles.So, try the experiment with 3 marbles on the left, and 4 marbles on the right.......
http://www.admissionstests.cambridgeasse…

thank you

(QUESTION 13)

explain your logic, methoding, and how your thinking process carried out the question from the begining

thanks

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Alex, the point of this exercise is to get you to experiment, thereby getting insight. To narrow down the possibilities, I would think it is enough to start with the case when each bag has just 3 marbles.

So, let X, Y, Z denote 3 different colors, and suppose you are starting with two bags as follows:

L: X, X, X R: Y, Y, Z

Now, it is easy to "carry out" the procedures described in the problem (by writing down the bag contents after each step).

Such experimentation is much more productive, and offers a much greater long-term learning value for a future biomedical scientist or engineer, than having someone give the answer.

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I just noticed a nuance in the problem: after tipping the right-hand bag, we see that "half" the marbles are red. That means, the right-hand bag originally contained an *even* number of marbles. So, try the experiment with 3 marbles on the left, and 4 marbles on the right.

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