CTS Company Numerical Ability Percentage

There are 600 tennis players 4% wear wrist band on one wrist Of the remaining, 25% wear wrist bands on both hands How many players don't wear a wrist band?

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CTS Other Question
Given the following functions
(1) f (n a b c ) = ac if n=1
(2) f (n a b c) = f ( n-1 a c b) + f ( 1 a b c) + f ( n-1 b a c )
if n > 1
Then what is the value f ( 2 a b c ) = ? A starts from a place at 11.00 A.M. and travels at a speed of 4 kmph, B starts at 1.00 P.M. and travels with speeds of 1 kmph for 1 hour, 2 kmph for the next 1 hour, 3 kmph for the next 1 hour and so on. At what time will B catch up with A?

a) 9.24 b)9.32 c)9.48 d)none