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expected number of times the ball numbered 1 is observed

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Question

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Consider an urn containing 1000 balls. Suppose that the balls are numbered
from 1 to 1000. If we draw only 50 balls out of the 1000, WITHOUT replacement, find the
expected number of times the ball numbered 1 is observed.

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