Question

A teacher had 18 red pens. If the ratio of red pens to blue pens she owned was 3:5 how many pens did she have total?

Answer 1

total = 48

Step-by-step explanation:

Red/Blue = 3/5

From this you conclude, assuming that the only types of pen colors are red and blue:

Red/Total = 3/3 + 5

18/Total = 3/8