Answer:
10
Step-by-step explanation:
So if you know that 10 skeins makes 4 scarves... then 20 skeins makes 8 scarves (because you doubled it)
and if 10 skeins make 4 scarves... then half that number of skeins should make half the number of scarves... so 5 skeins makes 2 scarves
So we know that 20 skeins makes 8 scarves and 5 skeins make 2 scarves... all we have to do is add up the skeins and find we get 10 scarves
