Solving a Probability Problem: Get Help Here!

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The discussion revolves around solving a probability problem involving the placement of three coins. The initial suggestion is to focus on the probability of coins being placed on the diagonals, but others recommend a step-by-step approach. It is advised to consider the placement of each coin sequentially, starting with the first coin, which can be placed anywhere. After fixing the first coin, the number of options for placing the second coin is analyzed, followed by the third coin. This structured method aims to clarify the overall probability calculation.
alan4cult
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Hello, I have a problem with this question
http://www.icefusionf1.com/prob.png
My thoughts:
I think it is better to work out the probability of the 3 coins being placed on the diagonals.

Please help?
 
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… one coin at a time …

alan4cult said:
I think it is better to work out the probability of the 3 coins being placed on the diagonals.

No. :frown:

In problems like this, generally start "the first one …, then the second one …, then …"

In this case, place the thre coins one at a time.

The first coin can go anywhere - no restriction.

With the first coin fixed, how many options are there for the second coin?

Then, with both the first and second coins fixed, how many options are there for the third coin? :smile:
 

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