redflower
10-17-2008, 06:03 AM
السلام عليكم ورحمة الله وبركاته
عندي بعض الاسئلة في الاحتمالات والحقيقة حاولت الاجابة عليهم ولكن لم استطع فارجو منكم المساعدة ولكم
جزيل الشكر والتقدير
الاسئلة:
السؤال الاول
a technician has 3 resistors with values of 100,300,and 900 " /><O:p></O:p>
if she connects them randomly in the configuration shown
(انظرالملف المرفق)
a)what is the probability that the equivalent resistance of this network will be 390
Ω<O:p></O:p>
b) what is the probabiility that the equivalent resistance will be greater than 390
Ω<O:p></O:p>
c)what is the probability that the equivalent resistance will be less than 1000
Ω<O:p></O:p>
السؤال الثاني
a box contains alarge number of 100
Ω resistors and an equal number of 400 resistors. three resistors are selected at random from the box and connected as shown
(انظر نفس الشكل المرفق)
a)what is the probability that the equivalent resistance of this network will be less than 200 اوم
b)what is the probabilitythat theequivalent resistance will be greater than 500
Ω<O:p></O:p>
السؤال الثالث
two solid- state diods are connected parallel. each diode has a probability of .05 that it will fail as ashort circuit an a probability of .10 that it will fail as an open circuit . if yhe diodes are independent, what is the probability that the parallel combinationwill function?
(note that one short circuit causes the combination to fail, but one open circuit does not
88
عندي بعض الاسئلة في الاحتمالات والحقيقة حاولت الاجابة عليهم ولكن لم استطع فارجو منكم المساعدة ولكم
جزيل الشكر والتقدير
الاسئلة:
السؤال الاول
a technician has 3 resistors with values of 100,300,and 900 " /><O:p></O:p>
if she connects them randomly in the configuration shown
(انظرالملف المرفق)
a)what is the probability that the equivalent resistance of this network will be 390
Ω<O:p></O:p>
b) what is the probabiility that the equivalent resistance will be greater than 390
Ω<O:p></O:p>
c)what is the probability that the equivalent resistance will be less than 1000
Ω<O:p></O:p>
السؤال الثاني
a box contains alarge number of 100
Ω resistors and an equal number of 400 resistors. three resistors are selected at random from the box and connected as shown
(انظر نفس الشكل المرفق)
a)what is the probability that the equivalent resistance of this network will be less than 200 اوم
b)what is the probabilitythat theequivalent resistance will be greater than 500
Ω<O:p></O:p>
السؤال الثالث
two solid- state diods are connected parallel. each diode has a probability of .05 that it will fail as ashort circuit an a probability of .10 that it will fail as an open circuit . if yhe diodes are independent, what is the probability that the parallel combinationwill function?
(note that one short circuit causes the combination to fail, but one open circuit does not
88