Solving a Probability Problem: Get Help Here!

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SUMMARY

This discussion focuses on solving a probability problem involving the placement of three coins on a grid. The recommended approach is to analyze the placement sequentially: first placing one coin, then determining the options for the second coin based on the first, and finally assessing the options for the third coin based on the first two. This methodical approach allows for a clearer understanding of the probability involved in the arrangement of the coins on the diagonals.

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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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