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Primary 6 · Average · Question type 5.6

P6 Average: Mixed Average Questions

This question uses two totals, a changing number of days and a zero that must still be counted.

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Primary 6, on the MOE Primary Mathematics syllabus.

In the Average chapter6 question types · see the chapter

The lesson · 1 minute 32 seconds

How do you solve mixed P6 average questions?

Watch: 8, 0, 9 and 3 pies, and a fifth day to find

Practise · Modelled on top school exam questions

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Find the value removed from a record

Work out which totals you need before choosing a calculation.

A fitness class averaged 26 attendees over its first 4 weeks. One week's figure was then struck off the record because the class had been merged with another that week, and the average of the remaining 3 weeks became 28. How many attendees were there in the week that was struck off?

attendees

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  1. total for 4 weeks = 26 × 4 = 104
  2. total for 3 weeks = 28 × 3 = 84
  3. struck-off week = 104 - 84 = 20 attendees

Ans: 20 attendees

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