If `A:B=5:6` and `B:C=4:7`,then find `A:C`

If A:B=3:4 and B:C=2:3 , find A:B:C .

If A:B = 3:5 and B: C = 8:11, find A.C.

If A:B = 2:7 and B:C = 9:13, find A:C.

If A:B = 1:3 and B: C = 2:5. find A:C.

(a) If A : B = 3 : 4 and B : C = 6 : 7 , find : (i) A : B : C (ii) A : C (b) If A : B = 2 : 5 and A : C = 3 : 4 , find : A : B : C .

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

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=6:7 ,find a:b:c

If A={1,2,3,4,5}, B={1,2,3,6,7} and C{8}, then find (A-B) xx C .

If 2A = 5B = 7C, find A:B:C.