If a : b = 7 : 9 and b : c = 5 : 7, then what is a : c ? – McqOptions

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1.	If a : b = 7 : 9 and b : c = 5 : 7, then what is a : c ?
A.	5 : 9
B.	3 : 5
C.	7 : 21
D.	7 : 15
Answer» B. 3 : 5

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