1994 AHSME Problems/Problem 27
A bag of popping corn contains white kernels and yellow kernels. Only of the white kernels will pop, whereas of the yellow ones will pop. A kernel is selected at random from the bag, and pops when placed in the popper. What is the probability that the kernel selected was white?
To find the probability that the kernel is white, the probability of
Running a bit of calculations while Plugging this into the earlier equation, . Meaning that the answer is .