Exponential Distribution - time between customers

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We solve the following problem related to the exponential distribution:
During the busiest time of the day at the Coffee Store, an average of 24 customers arrive per half-an-hour period.
a) What is the probability that a customer will arrive within the next 2 minutes?
b) What is the probability that the time between the arrivals of customers is 1 minute or more?
c) What is the probability that the next customer will arrive within 1 and 3 minutes?
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It's very clear! Thank you so much

ChueyadanarLinn
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thanks big brother
may god bless you

deepanshusharma