The owner of a music store ordered new compact disks. Of the ne compact disks ordered, 1/4 are Jazz, 2/7 are Classical, and the rest of the compact disks are Soft Rock. What fraction of the compact disks ordered are Soft Rock?

Question

3/4
3/7
15/28
13/28

Answer 1

To find the fraction of compact disks that are Soft Rock, we first need to determine the fraction of compact disks that are Jazz and Classical.

Fraction of Jazz compact disks = 1/4
Fraction of Classical compact disks = 2/7

To find the fraction of Soft Rock compact disks, we add the fractions of Jazz and Classical compact disks and subtract that from 1:

Fraction of Soft Rock compact disks = 1 - (1/4 + 2/7)
Fraction of Soft Rock compact disks = 1 - (7/28 + 8/28)
Fraction of Soft Rock compact disks = 1 - 15/28
Fraction of Soft Rock compact disks = 13/28

Therefore, the fraction of compact disks ordered that are Soft Rock is 13/28.