Albert wants to buys some pens. He is comparing 4 different packs of pens. The number of pens in each pack and the cost of the pack is shown in the table below. Which two packs of pens have the same cost per pen?

Answer:
There are 2 red pens in each pack
There are 3 blue pens in each pack
Step-by-step explanation:
we know that
270=2*3^{3} *5
180=2^{2}*3^{2}*5
Find the Greatest Common Factor (GCF)
The GCF is equal to------> 2*3^{2}*5=90
the greatest number of packs she can make is 90
Find the number of red pens in each pack 180/90=2 red pens
Divide the total number of red pens by the total number of packs
Find the number of blue pens in each pack 270/90=3 blue pens
Divide the total number of blue pens by the total number of packs