The total cost to buy 12 balloons was $4. The total cost to buy 19 balloons was $6. What was the average cost of the balloons

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2015-11-05 04:11:59

the average cost of balloons is $3

2015-11-05 04:13:14

average cost=total number of balloons/total cost= total number=12+19=31 total cost=4+6=10 so average cost=31/10=3.1 the average cost was $3.10 per ballon

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