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HELP! WJEC S1 Question!!!

Hey guys, I'm really confused on this question on Poisson distribution.
Its WJEC S1 June 2013, question 4b.

How is the probability of success 0.0625???
I just don't get it from the context of the question.

That's the only thing I'm confused about, other than that I get it.

Please help, thank you!
Because unlike in the first part of the question Bethan is now throwing 2 dice. Therefore the probability of success has changed from 1/4 or 0.25 to (1/4)^2 = 1/16 which is the same as 0.0625. (a quarter squared is due to the 2 dice)
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ovo_zverit
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Original post by williamsae
Because unlike in the first part of the question Bethan is now throwing 2 dice. Therefore the probability of success has changed from 1/4 or 0.25 to (1/4)^2 = 1/16 which is the same as 0.0625. (a quarter squared is due to the 2 dice)


Thank you!!

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