what is the probability of getting a queen or spade from a set of cards ?
"no . of spade = 13 no . of queen = 3 ( excluding queen of spade ) no . of possible outcome = 13 + 3 = 16 probability = no . of favorable outcome / total possible outcomes = 16 / 52 = 4 / 13 answer : b"
divide(const_2, choose(add(const_3, const_3), const_3))