63% of all students at a college still need to take another math class. If 31 students are randomly selected, find the probability that a. Exactly 20 of them need to take another math class. b. At most 19 of them need to take another math class. c. At least 18 of them need to take another math class. d. Between 18 and 26 (including 18 and 26) of them need to take another math class. Hint:
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.
63% of all students at a college still need to take another math class. If 31 students are randomly selected, find the probability that
a. Exactly 20 of them need to take another math class.
b. At most 19 of them need to take another math class.
c. At least 18 of them need to take another math class.
d. Between 18 and 26 (including 18 and 26) of them need to take another math class.
Hint:
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