Question

the ratio of red counters to blue counters is 1:3 how manyred counteres do you need to add to makethe ratio of red to blue 3:1

Answer 1

Answer:

x= 8x

Step-by-step explanation:

Assume there are n counters and r of these are red. Then (n-r) are blue.

r/(n-r) = 1/3

n-r = 3r

n = 4r

Now add x red counters, so there are (r+x) red counters

Total number of counters is n+ x = 4r +x

Number of blue counters = (4r+x) - (r+x) = 3r

(r+x)/3r = 3

r+x = 9r

x = 8r

So we add 8 times the initial number of red counters.