11.Adjacent Bullets
★★★conditional probabilitySIG
A six-chamber revolver is loaded with two bullets in adjacent chambers. The cylinder is spun once, the trigger pulled, and the chamber is empty. Without spinning again, the trigger is pulled a second time. What is the probability that this second chamber is also empty?
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Surviving the first pull rules out two of the six starting chambers. For each of the four that remain, ask what sits in the very next chamber.
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