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Mathematics 7 Online
OpenStudy (anonymous):

suppose that in 32 rolls a sum of 8 is rolled twice. Would you consider it unusally expalin.

jimthompson5910 (jim_thompson5910):

look at this chart http://bestcase.files.wordpress.com/2011/01/dicediagram.jpg and tell me how many sums of 8 you see

OpenStudy (anonymous):

5

jimthompson5910 (jim_thompson5910):

so the probability of rolling a sum of 8 is 5/36 since there are 36 ways to roll 2 dice

jimthompson5910 (jim_thompson5910):

if you roll 2 dice 32 times, then you expect to get a sum of 8 about (5/36)*32 = 4.444 = 4 times

jimthompson5910 (jim_thompson5910):

so I wouldn't consider it that unusual since it's pretty close to 2

OpenStudy (anonymous):

ok

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