Junk mail

Junk mail

Pencil and paper
Overview
Using this Resource
Connecting to the Curriculum
Marking Student Responses
Further Resources
This task is about reading information from a frequency table.

In a week, Mrs Swallow calculates the average number of pieces of junk mail she gets as 5 per day.

a) The number of pieces for 6 days is given in the table below. Fill in the missing number for Friday:
   

Day of week MON TUE WED THU FRI SAT SUN
Number of pieces of junk mail 3 5 6 3   7 6

b)
 
Mrs Senical lives in a city where junk mail is not delivered on a Monday. She calculates that the average for the other 6 days is 6 pieces per day.
 
How many items of junk mail does Mrs Senical get in a week? __________
 
c)
Mrs Swallow always skims through her junk mail looking for bargains, and finds that it takes on average 10 minutes per piece.
 
How long did it take her for the week? __________
 
d)
Mrs Senical weighs all her junk mail for the week, and finds that it comes to 1.5 kg.
There are 30,000 households in the city, and they all get the same amount of junk mail each day.
 
How many tonnes of paper is this for the week? (1 tonne = 1,000 kg) __________ tonnes
Task administration: 
This task can be completed with pencil and paper.
Level:
4
Description of task: 
Students complete a frequency table on some provided data and carry out calculations related to averages.
Curriculum Links: 
This resource can be used to help to identify students' ability to interpret a table of data including calculating means.
 
Learning Progression Frameworks
This resource can provide evidence of learning associated with within the Mathematics Learning Progressions Frameworks.
Read more about the Learning Progressions Frameworks.
Answers/responses: 
 

Y8 (10/1996)

Y9 (10/1996)

a) 5 pieces on Friday [35-30] easy easy
b) Mrs Senical gets 36 pieces. moderate easy
c) 5 hr 50 min [350 minutes is also an acceptable answer.] difficult moderate
d) 45 tonnes difficult difficult