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  1. If
    a
    		 =
    7
    		 ,
    b
    		 =
    3
    		 , then the value of a : b : c is
    b9c5

    1. 7 : 9 : 15
    2. 7 : 9 : 5
    3. 21 : 35 : 45
    4. 7 : 3 : 15
Correct Option: A

a : b = 7 : 9
b : c = 3 : 5 = 9 : 15
∴ a : b : c
= 7 : 9 : 15


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