Witches at a coffee shop
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Two witches each makes a nightly visit to an all-night coffee shop. Each arrives at a random time between 0:00 and 1:00. Each one of them stays for exactly 15 minutes. On any one given night, what is the probability that the witches will meet at the coffee shop?
1/4
Explanation: I am doing the sampling in minutes only.
Lets assume witch A arrives at 0:00 sharp than witch B needs to arrives in a time slot of 0:00 to 0:15 only so as to meet the witch A.
So probability would be (1/60 )* (15/60)
Now witch A can arrive any time so we will multiply by 60.
Hence answer would be(1/60 )* (15/60) *60 = 1/4
Your Answer
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