A box contains 5 red balls, 6 white balls and 9 black balls. Two balls are drawn at random. (The first ball is not replaced). Find the probability that both balls are of the same colour.
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 box contains 5 red balls, 6 white balls and 9 black balls. Two balls are drawn at
random. (The first ball is not replaced). Find the
the same colour.
8.2 At the Durban beachfront it rains on 20% of days and it is windy on 30% of days.
If rain and wind are independent, any particular day find the probability that:
8.2.1 it rains and is windy.
8.2.2 it does not rain and is not windy.
8.2.3 it rains or is windy.
8.2.4 it does not rain or is not windy.
8.3 Draw a Venn diagram to illustrate the data in question 8.2 above.
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