If a card is drawn from a well shuffled pack of cards, the probability of drawing a spade or a king is -	Choose the correct choice from the following:  A) 8 / 13  B) 6 / 13  C) 3 / 13  D) 4 / 13  E) 1 / 13

Rationale: explanation : p ( s á ´ œ k ) = p ( s ) + p ( k ) - p ( s â ˆ © k ) , where s denotes spade and k denotes king . p ( s á ´ œ k ) = 13 / 52 + 4 / 52 - 1 / 52 = 4 / 13 answer : d
Answer: D