Q10. Prove that if A, B and C are independent, then AUB (A union B) is independent Add Image/PDF files to Q10 of C. Q9. If A and B are two events, prove that P(ANB) ≥ 1 − P(Ā) – P(B). [Note: This is a simplified version of the Bonferroni inequality.]
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- Assume that the probability that an airplane engine will fail during a torture test is 12and that the aircraft in question has 4 engines. Construct a sample space for the torture test. Use S for survive and F for fail.If a binomial experiment has probability p success, then the probability of failure is ____________________. The probability of getting exactly r successes in n trials of this experiment is C(_________, _________)p (1p)Q9. If A and B are two events, prove that P(ANB) ≥ 1 − P(Ā) – P(B). [Note: This is a simplified version of the Bonferroni inequality.] -
- (b) Suppose the 4-digit PINS are randomly distributed. How many peo- ple must be in a room such that the probability that two of them have the same PIN is at least 1/2? (Here "4 digits" means that the PIN cannot start with a 0.) Note: Pay special attention to the direction of the inequality in the formula(s) used for this question.6. The prosecutor's fallacy. Let G be the event that some accused person is guilty, and I the event that some testimony or evidence presented is in fact true. It has been known for lawyers to argue on the assumption that P(G|T) = P(TIG). Show that this holds if and only if P(G)=P(7).A container contains 45 green tokens, 5 blue tokens, and 3 red tokens. Two tokens are randomly selected without replacement. Compute P(F|E). E−you select a blue token first F−the second token is blue
- A student goes to the library. Let events B = the student checks out a book and D = the student checks out a DVD. Suppose that P(B) = 0.35, P(D) = 0.82 and P(B AND D) = 0.13. Find P(B|D). Give your answer as a decimal rounded to the nearest hundredthA container contains 50 green tokens, 15 blue tokens, and 4 red tokens. Two tokens are randomly selected without replacement. Compute P(F|E). E−you select a non−green token first F−the second token is gereen P(F|E)=Let X - Geom(p). Let s 2 0 be an integer. Show that P(X > s) = (1 – p)s. (Hint: The probability that more than s trials are needed to obtain the first success is equal to the probability that the first s trials are all failures.) a. b. Let t 2 0 be an integer. Show that P(X >s + 1 | X > s) = P(X > t). This is the memoryless property .[Hint: P(X > s + t and X > s) = P(X > s + t).] A penny and a nickel are both fair coins. The penny is tossed three times and comes up tails each time. Now both coins will be tossed twice each, so that the penny will be tossed a total of five times and the nickel will be tossed twice. Use the memoryless property to compute the conditional probability that all five tosses of the penny will be tails, given that the first three tosses were tails. Then compute the probability that both tosses of the nickel will be tails. Are both probabilities the same? C.
- Q16Given a 2 0 and b > 0, let u = a and v = Vab Use the Cauchy-Schwarz inequality to compare the geometric mean lah with the arithmetic mean (a + b)/2.A student goes to the library. Let events B = the student checks out a book and D = the student checks out aDVD. Suppose that P(B) = 0.40, P(D) = 0.30 and P(D|B) = 0.5.a. Find P(B′).b. Find P(D AND B).c. Find P(B|D).d. Find P(D AND B′).e. Find P(D|B′).