The amount that each of them need to pay to buy a whole pie together is $1.50.
Using this formula
Amount=Selling price of pie/Number of kids
Where:
Selling price=$7.50 each
Number of kids=5
Let plug in the formula
Amount=$7.50 / 5
Amount= $1.50
Inconclusion the amount that each of them need to pay to buy a whole pie together is $1.50.
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