Question

The ratio of baseballs to soccer balls is 20 to 1.
The ratio of soccer balls to footballs is 25 to 5.
There are 100 baseballs.

Answer 1

$\text{Baseballs} =b =100.\\\\\text{Soccer balls} = s.\\\\\text{Footballs} =f\\\\b:s = 20: 1 \\\\\implies \dfrac bs = 20\\\\\\\implies \dfrac{100}s = 20\\\\\\\implies s=\dfrac{100}{20} = 5\\\\\\s:f = 25:5\\\\\implies \dfrac sf = 5\\\\\implies \dfrac 5f =5\\\\\implies f = \dfrac55 =1\\\\\text{Hence f =1, b =100, s =5}$