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Question

2/5 of the voters promises to vote for A and rest promised to vote for B. On the last day 15% of the voters of A went back of their promise and vote for B.On the other hand 25% of the voters of B went back on their promises and vote for A. A lost by 4 votes. The total number of vote is :

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Solution

Iam here use p and Q instead of A and B
Say there were x voters in the city

0.4x promised to vote for P out of which 0.06x voted for Q
0.6x promised to vote for Q out of which 0.15x voted for P

Total votes P got = 0.49x
Total votes Q got = 0.51x

0.02x =2
x=100

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