Which Key? Suppose that you have a key ring with eight keys on it, one of which is your house key. Further suppose that you get home after dark and can’t see the keys on the key ring. You randomly try one key at a time, being careful not to mix the keys that you’ve already tried with the ones you haven’t. What is the probability that you get the right key a. on the first try?b. on the eighth try?c. on or before the fifth try?
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.
Which Key? Suppose that you have a key ring with eight keys on it, one of which is your house key. Further suppose that you get home after dark and can’t see the keys on the key ring. You randomly try one key at a time, being careful not to mix the keys that you’ve already tried with the ones you haven’t. What is the probability that you get the right key
a. on the first try?
b. on the eighth try?
c. on or before the fifth try?
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