In the month of January , the Railway police caught 4000 ticketless travellers .In February ,the number rose by
5% . However ,due to constant vigil by the police and the Railway staff, the number reduced by 5% and in April
it further reduced by 10% . the total number of ticketless travellers caught in the month of April was
Number of ticketless travellers in April
= 40000 x `(1 + 5/100)( 1 - 5/100) (1 - 10/100)` = `(4000 xx 21/20 xx 19/20 xx 9/10)` = 3591.
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