Question

a jar of yellow and green marbles has a ratio of 4 to 3. there are 320 yellow marbles. How many green marbles are in the jar? Round to the nearest tenth.

Answer 1

The jar of yellow and green marbles has a ratio of 4 to 3, so:

$4\colon3=\frac{4}{3}$

this tells us that for every 4 yellow marbles, there are 3 green marbles

so:

$\begin{gathered} \frac{320}{x}=\frac{4}{3} \\ where \\ x=Number_{\text{ }}of_{\text{ }}green_{\text{ }}marbles \\ so\colon \\ x=\frac{320\cdot3}{4} \\ x=240 \end{gathered}$

There are 240 green marbles in the jar