Shark barriers are used to protect swimmers at beaches, but surfers don't like shark barriers because they may cause injury to surfers. An independent researcher in Australia has been studying the issue at Ballina's Lighthouse Beach in New South Wales. She found that there is a 0.3 probability that the shark barrier can cause injury to surfers. Assuming that the data follow a binomial probability model, What is the probability that out of 7 randomly selected surfers in the area, only 2 become injured by the shark barrier?
