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# Probability question Help!!! watch

1. I have a fair n-sided die and a fair m-sided die,(m>n), what is the probability that when rolled both dice shows the same number? (pls explain working)

Thanks
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3. (Original post by NGEO)
I have a fair n-sided die and a fair m-sided die,(m>n), what is the probability that when rolled both dice shows the same number? (pls explain working)

Thanks
The scores on the dice are independent, so the probabilities can be worked out independently.

Let be the elementary event "scoring i on the n sided die", then

It is similar for the m sided die.

Then if you make it analogous to numerical values it's pretty obvious.

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Updated: October 31, 2017
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