three unbiased coins are tossed . what is the probability of getting all tails ?
"let , h - - > head , t - - > tail here s = { ttt , tth , tht , htt , thh , hth , hht , hhh } let e = event of getting two heads then e = { ttt } p ( e ) = n ( e ) / n ( s ) = 1 / 8"
negate_prob(divide(const_1, power(const_2, const_3)))