A recent survey indicates that 62% of students who registered in an Economics course have purchased a calculator. (i) If 12 students are randomly selected, what is the probability that exactly 4 students have purchased a calculator? (ii) If 150 students are randomly selected, what is the probability that at least 100 of them have purchased a calculator? do (ii) thanks
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.
A recent survey indicates that 62% of students who registered in an Economics course have purchased a calculator.
(i) If 12 students are randomly selected, what is the probability that exactly 4 students have purchased a calculator?
(ii) If 150 students are randomly selected, what is the probability that at least 100 of them have purchased a calculator?
do (ii) thanks
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