Question

If 3 CDs sell for 25$ how much do 15 Cds cosr

Answer 1

25 CD's should cost $125

Explanation:

We can use ratios to solve this problem. Put cost over number of CD's

$25 $ x

---------- = -----------

3 15

Using cross products

25*15 = 3x

Divide by 3

25*15/3 = 3x/3

125 =x

25 CD's should cost $125