poisonroxs

04-12-2008, 04:40 PM

Is this correct?

1 in 4,000,000 trips results in a fatality

if you take 50,000 trips what is the probability of having a fatal accident?

1-4,000,000

3,999,999/4,000,000 ^ 50,000 is 0.98758

1-.98758 is .012 or 1.2%

Additionally, the problem asked us to assume independent events. Why might the assumption of independance be violated? Is this because you can not possibly have more than 1 fatal car accident in a single lifetime?

Thanks in advance for any help with this problem :o)

1 in 4,000,000 trips results in a fatality

if you take 50,000 trips what is the probability of having a fatal accident?

1-4,000,000

3,999,999/4,000,000 ^ 50,000 is 0.98758

1-.98758 is .012 or 1.2%

Additionally, the problem asked us to assume independent events. Why might the assumption of independance be violated? Is this because you can not possibly have more than 1 fatal car accident in a single lifetime?

Thanks in advance for any help with this problem :o)