Probability question on bank customers

[aaa59]

The probability of a customer arriving in a bank per minute is 0.9. How many customers will arrive in 10 minutes?

Thanks
Ashish

 

[berkeman]

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?

 

[aaa59]

I have absolutely no idea

 

[aaa59]

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.

 

[montoyas7940]

Correct. On average...

 

[aaa59]

thanks

 

[Dylanette]

Think about what a probability is. Then think about how the probability of 0.9 was determined. At that point the answer is obvious.