Question

There are 20 pens in a package. Ten of the pens are black,8 are blue,and the rest is red. Which ratio represents the number of red pens to black pens?

Answer 1

Total number of pens in a package = 20

Number of black pens = 10

Number of blue pens = 8

Number of red pens =
`20-(10+8)=2`

The ratio that represents the number of red pens to black pens is=

`(2)/(10)=(1)/(5)` or 1:5