5+10+5-20 Q1) a) A company delivers a set of 12 wooden chairs to a certain school, out of which three are defective chairs. Five chairs are selected at random find the probability that, i. All five...

Extracted text: 5+10+5-20 Q1) a) A company delivers a set of 12 wooden chairs to a certain school, out of which three are defective chairs. Five chairs are selected at random find the probability that, i. All five are good chairs ii. At most two chairs will found to be defective. b) In a certain district the covid patients recover by vaccine is 0.4. If 10 people are infected by this discase. What is the probability, i. At least 6 survive. ii. From 2 to 7 survive. i. Exactly 3 survive. Exactly 2 are not surviving. Also find the expected value. iv. v. c) Is statistics is helpful for IT students in practical life? If yes then give example.