Respuesta :

She bought 9 rolls. 

dozen = 12

12 ÷ 4 = 3

Next multiply since it is dozen 

3×3

= 9 

Susuu
Dozen = 12

3/4th of a dozen = ?

Lets split 12 into 4 groups

3
3
3
3

3 + 3 + 3 = 9

3/4th of 12 = 9

Answer would be: Jazz bought 9 rolls.