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calculate probability

littlesis1953

New member
Joined
Apr 19, 2012
Messages
2
Here i my problem. I am having a hard time figuring which formula to use.
Suppose that on a mountain pass they don't patrol the speed limit very often so that if you speed through there, you have only a 1% chance of getting ticketed. You might guess that Lightning McQueen has a 100% chance of getting at least one speeding ticket if he makes 100 trips through the pass, but this is incorrect. Calculate the probability Lightning gets at least one speeding ticket on his 100 trips. Round answer to a percentage with one decimal place.
 

pka

Elite Member
Joined
Jan 29, 2005
Messages
7,688
Here i my problem. I am having a hard time figuring which formula to use.
Suppose that on a mountain pass they don't patrol the speed limit very often so that if you speed through there, you have only a 1% chance of getting ticketed. You might guess that Lightning McQueen has a 100% chance of getting at least one speeding ticket if he makes 100 trips through the pass, but this is incorrect. Calculate the probability Lightning gets at least one speeding ticket on his 100 trips. Round answer to a percentage with one decimal place.
\(\displaystyle (.99)^{100}\) is the probability that speedy gets no tickets. WHY?
So what is the probability he gets at least one?
 

littlesis1953

New member
Joined
Apr 19, 2012
Messages
2
Thank you.
 
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