Saturday 25 October 2014

Average

NOTE:
Average = Total ÷ no. of quantity
Note: 0 is considered one quantity too

Total = average x no. of quantities

For more revision:
Visible Thinking 5B Pg 25 Qn 28
Word Problems: refer to VT for more practice revision
Average topical test

Try!
In a test, A scored 34 marks, B scored 48 marks and C scored 20 marks. How many marks should C have scored if they want to increase their average by 3marks?

Answer will be posted as a comment. Check your work!

5 comments:

  1. Total --> 34 + 48 + 20
    = 102
    Average--> 102 ÷ 3
    = 34
    New Average --> 34 + 3
    = 37
    New total --> 37 x 3
    = 111
    C needs to score --> 111 – 34 – 48
    = 29

    ReplyDelete
  2. Who is that anyway????????

    ReplyDelete
  3. Oh,It is Miss Zhou!
    Sorry!

    ReplyDelete
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    ReplyDelete