If ` A : B = 4 : 5 and A : C = 2 : 3` , then what is `( A + B ) : ( B + C )` = ?

If a : b=4:5\ a n d\ b : c=2:3, then a : c=\ .................

If a : b=4:5 and b : c=2:3, then a : c (a) 4:3 (b) 8: 15 (c) 8:9 (d) 5:3

If A={1,2,3,4},B={2,3,4,5} and C={4,5,6,7} , then find each of the following : (i) A - (B-C) (ii) (A- B) -C .

If a : b = 3 : 5 and b : c = 4 : 7 , find a : b : c

If 2a + 3b -c =a + 2b + c =3a -b - c then what is the ratio of a:b:c?

If b=5a^(3)-2a+7 and c=2a^(2)+a+3, what is 3c-b in terms of a?

If a : b = 3 : 2 and b : c = 4 : 5 , find a : c

If (a+b)/(4)=4 and (a+c)/(c)=3 , what is the ratio of c to b?