Test due Jul 27, 2022 12:00-03 Brinell & Rockwell 0 01220 points karadady Bringll & Rockwell (BARI is a high-and manufacturer of cutting and drilling bits for lathe machines, Grill presses, and other metal-working equipment. They pride themselves in producing only bits of the very best quality, guaranteed to last longer than the bits from any of their competitors. Brinell & Rockwell has a hotline where customers can call to report when a BER bit fails before it is expected. M that time, Brinell & Rockwell will ship a replacement bit to the customer free of charge, and the customer will return the falled bit for examination. Back at the Quality Control Department of Brinell & Rockwell, a team of scientists and engineers - including several with Phos in Metallurgy - will examine the failed bits under the microscope, X-Ray machines, and other diagnostics equipment to determine exactly what went wrong. Brinell & Rockwell's quality control team keeps the falled bits that they have collected from customers in large glass containers, using one glass container per bit model. They have gathered thousands of failed drilling and cutting bits of 75 different models, including 62 models of drilling bits. These 62 models of drilling bits can be grouped into four families: Diamond Bits Tungsten Bits Iridium Bits Adamantium Bits 14 19 20 In summary, they have collected failed bits of 73 different models, and they use one glass container for every bit model. Therefore, Brinell & Rockwell has in the lab a total of 73 different glass containers. Taking into account that drilling bits can be grouped into families, we know that 14 glass containers contain Diamond bits, 18 glass containers contain Tungsten bits, 20 glass containers contain Iridium bits, and 9 glass containers contain Adamantium bits. Part 1 Donald Walker is the first worker to arrive to the lab. Following the standard policy of Brinell & Rockwell, he will pick up the first bit to be inspected from a randomly selected glass container. This means he is equally likely to pick up a bit from any one of the 73 containers. What is the probability that Donald will pick up an Iridium bit? Enter your atwear is in friction or in dicknal kamuiing three dadnil places. For sample, if your antineir is 21 24%, you should Bubmit You have used O of 15 attempts Part 2 0 0/2.0 points Igradechi Evelyn Sanders is the second worker to arrive to the lab. Following Brinell & Rockwell policy, she will pick two bits from randomly and independently selected containers. She is equally likely to select any of the containers. Even the container selected to pick up the first bit has the same chance of being chosen as any other container at the time she picks the second bit [manning that Evelyn could grab the same model of bit twice). What is the probability that Evelyn will pick up at least one Iridium bit? Enter your answer is in aquarion with fraction or in decings form using thees decimal places. For summpla, if your ariver is 21.14%, you should anwar 311 in the bos below or the respective sspreadion. Submit You have used 9 of 15 attempts Part 3 0 012.0 points [gradadj A now place of equipment, a positronic resonance imager (PR), has been acquired by Brinall & Rockwell, Their chief scientist, Wands, wants to try it on two randomly selected bit models, different from each other. This means once a bit model is picked up to serve as the first bit, the same model cannot be picked up again. What is the probability that both bits picked up are Tungsten bits? In other words, what is the probability of drawing two Tungsten bit consecutively, if the container from the first drawing was removed before the second drawing? Enter your answer is in aquinision with thiaction or in dicing: for ining three decimal places. For snapta, if your arrior is 7.143, you should anwer 312 in the bes bailaw or the nispicfive topmission