points ! Previous Answers DevoreStat9 3 E 013 ble. A mail-order company business

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points ! Previous Answers DevoreStat9 3 E 013 ble. A mail-order company business has six telephone lines, Let X denote the number of lines in use at a specified time. Suppose th plx) 0.12 0.15 0.20 0.25 0.18 ,0.07 0.03 Calculate the probability of each of the following events. (a) (at most three lines are in use) (b) ffewer than three lines are in use) (c) (at least three lines are in use) 053 (d) (between two and five lines, inclusive, are in use) (e) (between two and four lines, inclusive, are not in use) (f) fat least four lines are not in use) 072x Need Help?

Explanation / Answer

f) from above distreibution P( at least 4 lines are not in use) =P(at most 2 lines are in use) =(0.12+0.15+0.20)

=0.47

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