By using the definition of sample space and events to solve this problem） An unbiased die is tossed 7 times. What's is the probability of having exactly 4 times out of 7 rolls with numbers one or six facing upward?

By using the definition of sample space and events to solve this problem） An unbiased die is tossed 7 times. What's is the probability of having exactly 4 times out of 7 rolls with numbers one or six facing upward?

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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Q)By using the definition of sample space and events to solve this problem）

An unbiased die is tossed 7 times.

What's is the probability of having exactly 4 times out of 7 rolls with numbers one or six facing upward?

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