Question

6.

A shop sells CDs and DVDs.
In one week the number of CDs sold and the number of DVDs sold were in the ratio 3:5
The total number of CDs and DVDs sold in the week was 728
Work out the number of CDs sold.

Answer 1

273

Explanation:

CDs to DVDs is 3:5

`(728)/(3+5)`

`(728)/(8)=91`

`3 * 91: 5 * 91`

`273:455`

273 CDs were sold.

Answer 2

273

Explanation:

CD(3):DVD(5)

3+5=8

728 divided by 8= 91

3x91=273