From 100 tickets numbered 1, 2, 3, 4, - - - - - - - - -100, four are drown at random. What is the probability that 3 of them will bear number from 1 to 30 and fourth will bear any number from 31 to 100?

From 100 tickets numbered 1, 2, 3, 4, - - - - - - - - -100, four are drown at random. What is the probability that 3 of them will bear number from 1 to 30 and fourth will bear any number from 31 to 100?

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

From 100 tickets numbered 1, 2, 3, 4, - - - - - - - - -100, four are drown at random. What is the
probability that 3 of them will bear number from 1 to 30 and fourth will bear any number from 31
to 100?

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