Probability question on bank customers

  • Thread starter aaa59
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  • #1
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The probability of a customer arriving in a bank per minute is 0.9. How many customers will arrive in 10 minutes?

Thanks
Ashish
 

Answers and Replies

  • #2
berkeman
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What are your thoughts on how to approach this question? Does the probability of a customer arriving in the first minute affect the probability of a customer arriving in the second minute? What is this property called, and how does it help guide you to the answer here?
 
  • #3
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I have absolutely no idea
 
  • #4
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I would say that in 1 minute there is a 90% chance that a customer may arrive, so in 10 minutes the number of customers I would expect is 9.
 
  • #5
361
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Correct. On average...
 
  • #6
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thanks
 
  • #7
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Think about what a probability is. Then think about how the probability of 0.9 was determined. At that point the answer is obvious.
 

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