Camila sets up a passcode on her smart phone, which allows only four-digit codes. She has heard that it's more secure if a digit is repeated in the passcode. A spy sneaks a look at Camila's smart phone and sees her fingerprints on the screen over three numbers. What is the probability the spy is able to unlock the smart phone on his first try? Express your answer as a fraction in lowest terms or a decimal rounded to the nearest millionth.
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
Camila sets up a passcode on her smart phone, which allows only four-digit codes. She has heard that it's more secure if a digit is repeated in the passcode. A spy sneaks a look at Camila's smart phone and sees her fingerprints on the screen over three numbers. What is the
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