MARKING BRAINIEST!! Casey has a total of 18 pens. Twelve of these pens are blue, and the rest are red. What is the ratio of blue pens to red pens?
A 1:2
B 2:1
C 2:3
D 3:2

B)  2:1

Step-by-step explanation:

For every 12 blue pens, she has 6 red pens 12:6

Simplify 12:6= 2:1

B. 2:1

Step-by-step explanation:

Total # of pens = 18

# of Blue pens = 12

The number of red pens

= Total # of pens - # of blue pens

= 18 - 12

= 6 red pens

Ratio = 12 : 6

Simplified = 2:1

7! = 7×6×5×4×3×2

3! = 3× 2

as 7! is multiple of 3! because 7! contains 3! that is 3× 2 as factor

so 7! /(3! ) = 7× 6× 5× 4

= 42 × 20

= 840

its b) 840✌✌✌

dhruv⭐

215.92 dollars is the answer