The probability of obtaining a head in one toss of a coin is 1/2 and the probability of obtaining two heads in two coin tosses is 1/4. It follows that the probability of obtaining five heads in five coin tosses is 1/32. Suppose I flip a coin four times and obtain four heads. Then it is better to bet on tails for the fifth flip because the probability of five heads in a row is very small.

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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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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The probability of obtaining a head in one toss of a coin is 1/2 and the probability of obtaining two heads in two coin tosses is 1/4. It follows that the probability of obtaining five heads in five coin tosses is 1/32. Suppose I flip a coin four times and obtain four heads. Then it is better to bet on tails for the fifth flip because the probability of five heads in a row is very small.

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