the age of a and b are in the ratio 4:5 and of b and c in the ratio 3:2.the youngedt of three is  Choose the correct choice from the following answers:
A) a  B) b  C) c  D) can't say  E) none
a:b =&gt; 4:5 3*(a:b)=&gt; 12:15   b:c=&gt;3:2 5*(b:c)=&gt; 15:10   a:b:c =&gt;12:15:10   Therefore youngest is c.   ANSWER:c
<result>C</result>
the age of a and b are in the ratio 4:5 and of b and c in the ratio 3:2.the youngedt of three is