Question Three : It has been established over a long period of time that the
probability that an electricity company operative will be able to take
a reading from a house meter, due to the resident being at home, is
0.4.
a) Determine the probability that the first reading to be taken will be
on, or before, the th 7 house visit. b) Find the probability that the
operative will be able to take ...
i. ... exactly 3 readings in his first 7 visits.
ii. ... his 3rd reading on his 7th visit.
iii. ... his 3rd reading on, or before his 7th visit.