An entrance candidate is dealt three cards from a pack of fifty-two playing cards. To one significant figure the probability that he receives exactly one king is:
(i) 0.003; (ii) 0.01; (iii) 0.2; (iv) 0.05.
[There are four kings in a pack of playing cards.]
I tried doing 4/52 X 48/51 X 47/50 but this doesn't work.