a coin is tossed 7 times . what is the probability of getting exactly 6 heads ?
"the number of possible outcomes is 2 ^ 7 = 128 there are 7 ways to get exactly 6 heads . p ( exactly 6 heads ) = 7 / 128 the answer is e ."
multiply(power(divide(const_1, const_2), 6), multiply(choose(7, 6), divide(const_1, const_2)))