2005-Fall-Midterm

# Then you toss the selected coin a what is the

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Unformatted text preview: bability 1/2 of being selected). Then you toss the selected coin, (a) What is the probability that the tossed coin lands head? (b) What is the probability that you select coin 1 and it lands head? (c) Suppose that the tossed coin lands head. Given that information, what is the conditional probability that you selected coin 1? What is the conditional probability that you selected coin 2? (d) Given that the tossed coin lands head, what is the conditional probability that the reverse side of this coin (or the side facing down) is tail? More PastPaper: http://ihome.ust.hk/~cs_gxx Question 3: [20 Marks] The time needed to complete the midterm exam for ISMT111 is normally distributed with a mean of 100 minutes and a standard deviation of 15 minutes. 1000 students take the 2-hour exam from 7pm to 9pm. Answer the following questions. (a) What is the percentage of students who can complete their exam in the allotted time? (b) What is the probability that over 100 students find themselves unable to complete their exam in the allotted time? (c) How many stud...
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## This note was uploaded on 02/27/2010 for the course ISOM ISOM111 taught by Professor Anthonychan during the Spring '09 term at HKUST.

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