med by a certain in a day, what is the he fires 7 times, what is line Wiului Wy 17. Past records show that 80% of the operations performed doctor were successful. If he performs 4 operations in a day probability that at least 3 operations will be successful? 18. The probability of a man hitting a target is (1/4). If he fires 7 tim the probability of his hitting the target at least twice? 19. In a hurdles race, a player has to cross 10 hurdles. The probabiline will clear each hurdle is (5/6). What is the probability that he will down fewer than 2 hurdles? The probability that he knock in lohnts On this assumption ho