Marti grouped all her cd's into separate categories she said 2/5 are rock 1/6 are jazz 1/3 are hip hop and 1/4 are country music explain why this cannot be correct

Well each fraction should add up to be one.

To do this you need the LCD for 5, 6, 3, and 4.

The LCD is 60.

2/5, multiply by 12/12 and get: 24/60

1/6, multiply by 10/10and get:

10/60

1/3, multiply by 20/20 and get:

20/60

1/4, multiply by 15/15 and get:

15/60

Add 24/60+10/60+20/60+15/60. You get 69/60 which is not equal to 1. So that is why it is not true.