Mathematics, 11.12.2019 20:31 jordenv00
After watching a marathon of harry potter movies, a couple decides to keep having children until they have at least one magical child (a witch or wizard! ) and at least one non-magical child (a squib), and then stop. assume they never have twins, that the "trials" are independent with probability 1/2 of a having a magical child, and that they are fertile enough to keep producing children indefinitely. what is the expected number of children?
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