Question: b. The project is not finished on time. QUESTION 7 A large group of students took a test in Operations Research and their final grades

b. The project is not finished on time. QUESTION

b. The project is not finished on time. QUESTION 7 A large group of students took a test in Operations Research and their final grades ranges between 0 to 60. The probability distribution for the marks of these students is listed in the following table! Co cual lo evance of the work Mark of Operations Research Students 0 - 10 Otto - 2 = 11 - 20 15.5 21 - 30 2-30-8: 255 31 - 40 32002= 35.5 41 - 50 41 +50=0= wsis 51 - 60 51760-2-55.s. Probability 0.15 0.05 0.25 0.30 0.20 0.05 375 a. What the expected mark (i.e. average mark) of the Operations Research students that wrote this test? b. By how much did the test result of the Operations Research students vary? c. By how much did the test result of the Operations Research students deviate? QUESTION 8 A project consulting companies indicates that the probability of having risks A and B are 55% nactively based on 8 project samples observed

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