In a certain district, the ratio of the number of registered Republicans to the number of registered Democrats was 3/5. After 600 additional Republicans and 500 additional Democrats registered, the ratio was 4/5. After these registrations, there were how many more voters in the district registered as Democrats than as Republicans?
(a)100
(b)300
(c)400
(d)1000
(e) 2500
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We can let 4x and 5x be the new numbers of Repulbican and Democratic voters after the additional voters from both parties, respectively. We can create the equation:aditya67 wrote: ↑Wed Mar 25, 2020 10:24 amIn a certain district, the ratio of the number of registered Republicans to the number of registered Democrats was 3/5. After 600 additional Republicans and 500 additional Democrats registered, the ratio was 4/5. After these registrations, there were how many more voters in the district registered as Democrats than as Republicans?
(a)100
(b)300
(c)400
(d)1000
(e) 2500
(4x - 600)/(5x - 500) = 3/5
5(4x - 600) = 3(5x - 500)
20x - 3000 = 15x - 1500
5x = 1500
x = 300
Therefore, after the additional voters from both parties, there are 4(300) = 1200 Republicans and 5(300) = 1500 Democrats. We see that the number of Democrats is 300 more than that of Republicans.
Answer: B
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