There are only hb and f type pencils in the store. the ratio of the number of hb to f is 3 : 2. if there are 12f type pencils, how many pencils are there altogether?

Hello!

Let's put this as a proportion below and solve.

To solve for HP, we can see that we multiplied 2 by 6 to get to 12. We can do the same for 3.

3(6)=18

Just to check, we can cross multiply.

2x=36

x=18

Now we add.

18+12=30

Therefore, there are 30 pencils.

I hope this helps!