Asystem has two failure modes. one failure mode, due to external conditions, has a constant failure rate of 0.07 failures per year. the second, attributed to wear out, has a weibull distribution with a characteristic life of 10 yr and a shape parameter of 1.8. determine the system value design life of 1 year find by trail and error the median the time to failuer?

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.

add 5 subtract 1

step-by-step explanation:

16.9 times 2.85

step-by-step explanation:

step-by-step explanation:

de-gf

hj=3x+20

ji=15x-64