A friend of mine is flipping coins. He flips 30 coins and counts how many land "heads" up. I walk by and he announces that he just had 19 coins land "heads" up. What is the probability of 19 or more "heads" in 30 tosses of a coin? Hint: the mean is n*p. That means 30 * (.5) = 15 The standard deviation is sqrt(n*p*(1-p)) Then use stapplet. Make sure you change % to decimal before entering your answer. Move the decimal point 2 places. Answer to 2 decimal place