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Recent questions tagged probabilityexpectation

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Expectation
Suppose 100 people all toss a hat into a box and then proceed to randomly pick out a hat. What is the expected number of people to get their own hat back. Hint: express the number of people who get their own hat as a sum of random variables whose expected value is easy to compute.

Na462 asked in Probability Feb 19, 2019

by Na462

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expectation doubt
Given a stick with n joints. The stick is dropped from certain height. During the fall, each joint breaks with probability p independent of other joints. What is the expected number of pieces into which the stick breaks ? Also, what is expected number of substicks of length =3.

parulk asked in Probability Aug 16, 2018

by parulk

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Recent questions tagged probabilityexpectation