There are seven balls numbered 1 through 7 in an urn. An experiment consists of randomly picking 4 balls, one after another and without replacement. You then note the number on each selected ball.
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.
There are seven balls numbered 1 through 7 in an urn. An experiment consists of randomly picking 4 balls,
one after another and without replacement. You then note the number on each selected ball.
(a) Find the
(b) What is the probability that at least one selected ball is even?
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