STAT_14_2
In learning center there is a coffee machine for student
service. The number of machine faults is split into Poisson
distribution.
On a normal day the number of faults is 1 per day and on a busy day
the number of faults is 3 per day.
The probability that a day is a busy day is 0.3, independently of
other days.
A. What is the probability that in normal three days there will
be at least 2 faults all days together?
B. Days Sun to Wed, are ordinary days. It is known that on days Sun
and Mon there were a total of 4 machine failures.
What is the probability that on Wednesday there will be no glitches
at all?
C. What is the probability that on a random day there will be
exactly two machine failures?
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