Question

If the ratio of dogs to cats is 1 to 2 and there is a total of 21 animals how many are dogs

Answer 1

There are 7 dogs and 14 cats

Every one dog there are two cats 1:2
Also could be written as (cats) 7:12 (dogs)

Answer 2

Explanation:

Let cats = x and dogs = y

and given conditions are ,

dog: cat= 1:2

y:x=1:2

y/x = 1/2

• x=2y

also given that

total animals = 21

• x+ y=21 putt x=2y we get

2y +y =21

3y = 21

y = 7 Dogs

putt y = 7 in above equation we get

x+7=21

x=14 Cats