a coin is tossed 4 times . what is the probability of getting exactly 3 heads ?
the number of possible outcomes is 2 ^ 4 = 16 there are 4 ways to get exactly 3 heads . p ( exactly 3 heads ) = 4 / 16 = 1 / 4 the answer is b .
multiply(power(divide(const_1, const_2), 3), multiply(choose(const_4, const_3), divide(const_1, const_2)))