when 3 fair coins are tossed together , what is the probability of getting 2 tails ?
we can get 2 tails in 3 c 2 ways . we can get 3 tails in exactly one way . also , there are a total out 8 possible outcomes . thus , the required probability = ( 3 + 1 ) / 8 = 1 / 2 answer : a
divide(const_4, power(const_2, 3))