Discuss teh below:
Q: An article in Knee Surgery, Sports Traumatology, Arthroscopy ["Arthroscopic Meniscal Repair with an Absorbable Screw: Results and Surgical Technique" (2005, Vol. 13, pp.273-279)] cites a success rate of more than 90% for meniscal tears with a rim width under 3 mm, but only a 67% success rate for tears of 3-6 mm. If you are unlucky enough to suffer a meniscal tear ofunder 3 mm on your left knee and one of width 3-6 mm on yourright knee, what is the probability mass function of the number ofsuccessful surgeries? Assume that the surgeries are independent.