In a jar of 100 jellybeans, there are 80 green and 20 yellow jellybeans. 10 jellybeans are selected. What is the probability that there are at least 6 green jellybeans? (book's answer 0.975) This is my solution. The probability for getting a green one is .08 and for getting a yellow one is 0.2. So, we can use the binomial distribution for solving this problem. The success refers to a green jellybean and the failure represents the non-green jellybean. We can use the function, binomcdf, on the TI 84 calculator to work out the answer. The probability of getting AT MOST 5 green jellybeans is binomcdf(10,0.8,5) So, to solve the problem, we do 1-binomcdf(10.0.8,5)=0.967. That doesn't match the answer. Is the book's answer, 0.975, wrong?