Question

if a:b=2:3and a:c=1:2 then b:c is ​

Answer 1

3:4

Explaining
a:b=2:3
=>b=3a:2

a:c=1:2
=>c=2a

Putting the values
b/c=3a/2. *. 1/2a
=>b/c=3/4


b:c=3:4