a seemly easy problem

来源: 于 2011-01-27 18:01:29 [旧帖] [给我悄悄话] 本文已被阅读：次

You are told that on January 25, 2011 from 10:00 – 11:00 in your town you have a 0.90 (90% chance) probability of seeing a shooting star in the night sky in that hour.  Given that the probability of seeing a shooting star is constant throughout the hour, what is the probability of seeing a shooting star in the first 10 minutes?