If (5a - 3b) : (4a - 2b) = 2 : 3, then a : b is equal to:
(5a - 3b) : (4a - 2b) = 2 : 3
=> 15a -9b = 8a -4b
=>7a = 5b
=> a:b = 5:7
So , the answer would be option d) 5:7.
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