2377 winter 2010

# 2377 winter 2010 - MAT 2377 Midterm 23 February 2010 Time...

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MAT 2377 Midterm 23 February, 2010 Professor: R. Kulik Time: 80 minutes Student Number: Family Name: First Name: This is an open book examination. Only non-programmable and non-graphic calculators are permitted. Record your answer to each question in the table below. Number of pages: 3 (including this one). NOTE: At the end of the examination, hand in only this page. You may keep the questionnaire. Question Answer 1 2 3 4 5 6 7 8 9 10 1

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2 Q 1. A company’s warranty document states that the probability that a new swimming pool requires some repairs within the ﬁrst year is 20%. What is the probability, that the sixth sold pool is the ﬁrst one which requires some repairs within the ﬁrst year? (a) 0.6068 (b) 0.3932 (c) 0.9345 (d) 0.0655 (e) none of the preceding Q 2. Let X denote a number of failures of a particular machine within a month. Its probability mass function is given by x 0 1 2 3 4 5 P ( X = x ) 0.17 0.23 0.19 0.13 0.08 0.2 Compute the probability that there are more than 3 failures within a month.
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2377 winter 2010 - MAT 2377 Midterm 23 February 2010 Time...

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