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.
Showing posts with label M Average P5 NY. Show all posts
Showing posts with label M Average P5 NY. Show all posts
Wednesday, October 6, 2010
Subscribe to:
Posts (Atom)