Student teacher ratio

The number of students studying teacher studies in mathematics has decreased in the last twenty years in a ratio of 2:10. How many students are studying teacher studies now when twenty years ago there were 50?

Final Answer:

n₂ =  10

Step-by-step explanation:

$$\begin{gathered} r=2:10=0.2=1:5 \\ {n}_1=50 \\ {n}_2=r\cdot n_1=0.2\cdot 50=10 \end{gathered}$$

Try another example