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mathematics UK Year 11 Mathematics (KS4)
 
Solved problems for the chapter:
 

Interpreting and drawing inferences from tables

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Detailed solution steps are available at:
 
https://en.openprof.com/wb/chapter:interpreting_and_drawing_inferences_from_tables/5374/


Example 1.

Jane paid the monthly amounts listed in the following table for using a mobile phone last year:


MonthAmount (in Pounds) 
January 
February 
March 
April 
May 
June 
July 
August 
September 
October 
November 
December 

  • Calculate the average monthly amount of Jane's payments on mobile phone. How many months did she pay a higher amount than the average monthly amount?


  • Jane had 220 pounds monthly scholarships. Calculate what percentage of the scholarship she spent on mobile phone used last year.


  • The pie chart shows the shares of the annual amount that Jane paid last year for SMS, Subscription and Calls. How much did Jane pay for each service last year?




    
Example 2.

Tina earned 218.40 pounds in July with her student work, Lea 98.20 pounds, and Meta 101.60 pounds. In August, Tina earned a fifth less, Lea increased her earnings by 15%, and Meta earned the same amount as in July.


  • Calculate the missing values and fill in the table.


     TinaLeaMeta 
    Earnings in July (in Pounds)    
    Earnings in August (in Pounds)    

  • Calculate the average earnings of the girls in July and in August. Calculate by how many pounds the average August earnings of the girls were lower than the average earnings in July.


  • Meta invested her entire earnings in a bank that pays interest at the annual interest rate of 2.5% with an annual accrual of interest. Calculate how many more pounds she will have in four years.