# Probability densities

by mikemike123
Tags: densities, probability
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 P: 5 Heres the question.... The time between arrivals of taxis at a busy intersection is exponentially distributed with a mean of 10 minutes. The question I am stuck on is.... Suppose you have already been waiting for one hour for a taxi, what is the probability that one arrives within the next 10 minutes. (The first part of the problem was to find probability you wait longer then an hour which I figured the limits would be (60
Sci Advisor
P: 1,750
 Quote by mikemike123 Heres the question.... The time between arrivals of taxis at a busy intersection is exponentially distributed with a mean of 10 minutes. The question I am stuck on is.... Suppose you have already been waiting for one hour for a taxi, what is the probability that one arrives within the next 10 minutes. (The first part of the problem was to find probability you wait longer then an hour which I figured the limits would be (60
Not subtract. You have a conditional probability here.
 P: 5 Ok so if my given is the answer I got for my first part, .0025. How would I go on finding the Probability of P(AintersectB)?
Sci Advisor
P: 1,750
Probability densities

 Quote by mikemike123 Ok so if my given is the answer I got for my first part, .0025. How would I go on finding the Probability of P(AintersectB)?
You need Pr(60 < t < 70) given Pr(60 < t). What's the formula for that?

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