TCS Company Numerical Ability Profit and Loss

If on an item a company gives 25% discount, they earn 25% profit. If they now give 10% discount then what is the profit percentage.
option
(a) 40%
(b) 55%
(c) 35%
(d) 30%

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TCS Other Question

In a flight of 600 km, an aircraft was slowed down due to bad weather. Its average speed for the trip was reduced by 200 km/hr and the time of flight increased by 30 minutes. The duration of the flight is:
option
(a) 1 hour
(b) 2 hours
(c) 3 hours
(d) 4 hours
In how many different ways can the letters of the word 'LEADING' be arranged in such a way that the vowels always come together?
option
(a) 360
(b) 480
(c) 720
(d) 5040