Wednesday, October 6, 2010

Average P5 2009 SA2 Nanyang P2 Q14

Joanne bought 7 balloons at the carnival. After that she bought another 4 balloons at $9.80 each the average cost of the balloons increased by $0.60. What was the total cost of the balloons? [4 marks]


9.80 x 4 = 39.20

0.60 x 7 = 4.   Total increase of 7 balloons

39.20 - 4.20 = 35.00    Total of 4 balloons after decrease (inrease in 7 balloons)

35.00 / 4 = 8.75   Average

8.75 x 11 = $96.25

It was $96.25.

1 comment:

  1. Nanyang Primary School 2009 P5 SA2 Paper 2 Q14
    [4 marks]

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