Respuesta :

Answer:

200

Step-by-step explanation:

300/15      

 divide cost by number bought

20        

you will get this number, so for 1 ball you will pay 20

20 x 10        

you will take the price for one ball and multiply it by the number of balls you want to buy

200      

you will have to pay this number for 10 balls

Answer:

$200 (or whatever the currency is since it is not specified here)

Step-by-step explanation:

We can create a proportion for this

$300/15 balls = $x/10 balls

Cross-multiplication: 15x = 3000

Divide: x = $200