A supermarket compiled the following information regarding 30 of its employees. 8 worked in the produce department, 9 stacked food on shelves, 18 operated the cash register,4 worked in the produce department and stacked food at different times,5 worked in the produce department and operated the cash register at different times,3 stacked food and operated the cash register at different times, 2 did all three jobs at different times. How many of the employees; i) Did at least two of these jobs? ii) Worked in produce only? iii) Did only one of the jobs? iv) Stacked shelves or operated the cash register? v) Stacked shelves and operated the cash register but did not work in produce?
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.
3. (a) A supermarket compiled the following information regarding 30 of its employees. 8
worked in the produce department, 9 stacked food on shelves, 18 operated the cash
register,4 worked in the produce department and stacked food at different times,5 worked
in the produce department and operated the cash register at different times,3 stacked food
and operated the cash register at different times, 2 did all three jobs at different times.
How many of the employees;
i) Did at least two of these jobs?
ii) Worked in produce only?
iii) Did only one of the jobs?
iv) Stacked shelves or operated the cash register?
v) Stacked shelves and operated the cash register but did not work in produce?
(b) Total reserves of a non-renewable resource are 250 million tonnes. Annual
consumption, currently at 20 million tonnes per year, is expected to rise by 2% a year.
After how many years will stocks be exhausted?
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