Oct 16, 2015 · 11/16 Consider a general task of flipping N coins and the probability of exactly K times the heads are up. Let's use a symbol P(N,K) for this probability. Knowing this, we can use the result to evaluate P(4,2)+P(4,3)+P(4,4) which will answer the question of what is the probability of getting heads at lease 2 times out of flipping a coin 4 times. I thought that all you have to do is: (1/3)(1/3)(2/3) It makes sense to me, but . math. a student claims that if a fair coin is tossed and comes up heads 5 times in a row, then according to the law of averages the probability of tails on the next toss is greater than the probability of heads. What is your reply? math